diff --git a/lib/assets/libs/math.js b/lib/assets/libs/math.js
new file mode 100644
--- /dev/null
+++ b/lib/assets/libs/math.js
@@ -0,0 +1,468 @@
+var $module=(function($B){
+
+var _b_ = $B.builtins
+var $s=[]
+for(var $b in _b_) $s.push('var ' + $b +'=_b_["'+$b+'"]')
+eval($s.join(';'))
+
+//for(var $py_builtin in _b_){eval("var "+$py_builtin+"=_b_[$py_builtin]")}
+
+var float_check=function(x) {
+    if (x.__class__===$B.LongInt.$dict){return parseInt(x.value)}
+    return x
+}
+
+var isWholeNumber=function(x){return (x*10) % 10 == 0}
+
+var isOdd=function(x) {return isWholeNumber(x) && 2*Math.floor(x/2) != x}
+
+var isLargeNumber=function(x) {return x > Math.pow(2,32)}
+
+// Big number Library from jsfromhell.com
+// This library helps with producing "correct" results from 
+// mathematic operations
+
+//+ Jonas Raoni Soares Silva
+//@ http://jsfromhell.com/classes/bignumber [rev. #4]
+
+
+var BigNumber = function(n, p, r){
+    var o = this, i;
+    if(n instanceof BigNumber){
+        for(i in {precision: 0, roundType: 0, _s: 0, _f: 0}) o[i] = n[i];
+        o._d = n._d.slice();
+        return;
+    }
+    o.precision = isNaN(p = Math.abs(p)) ? BigNumber.defaultPrecision : p;
+    o.roundType = isNaN(r = Math.abs(r)) ? BigNumber.defaultRoundType : r;
+    o._s = (n += "").charAt(0) == "-";
+    o._f = ((n = n.replace(/[^\d.]/g, "").split(".", 2))[0] = n[0].replace(/^0+/, "") || "0").length;
+    for(i = (n = o._d = (n.join("") || "0").split("")).length; i; n[--i] = +n[i]);
+    o.round();
+};
+with({$: BigNumber, o: BigNumber.prototype}){
+    $.ROUND_HALF_EVEN = ($.ROUND_HALF_DOWN = ($.ROUND_HALF_UP = ($.ROUND_FLOOR = ($.ROUND_CEIL = ($.ROUND_DOWN = ($.ROUND_UP = 0) + 1) + 1) + 1) + 1) + 1) + 1;
+    $.defaultPrecision = 40;
+    $.defaultRoundType = $.ROUND_HALF_UP;
+    o.add = function(n){
+        if(this._s != (n = new BigNumber(n))._s)
+            return n._s ^= 1, this.subtract(n);
+        var o = new BigNumber(this), a = o._d, b = n._d, la = o._f,
+        lb = n._f, n = Math.max(la, lb), i, r;
+        la != lb && ((lb = la - lb) > 0 ? o._zeroes(b, lb, 1) : o._zeroes(a, -lb, 1));
+        i = (la = a.length) == (lb = b.length) ? a.length : ((lb = la - lb) > 0 ? o._zeroes(b, lb) : o._zeroes(a, -lb)).length;
+        for(r = 0; i; r = (a[--i] = a[i] + b[i] + r) / 10 >>> 0, a[i] %= 10);
+        return r && ++n && a.unshift(r), o._f = n, o.round();
+    };
+    o.subtract = function(n){
+        if(this._s != (n = new BigNumber(n))._s)
+            return n._s ^= 1, this.add(n);
+        var o = new BigNumber(this), c = o.abs().compare(n.abs()) + 1, a = c ? o : n, b = c ? n : o, la = a._f, lb = b._f, d = la, i, j;
+        a = a._d, b = b._d, la != lb && ((lb = la - lb) > 0 ? o._zeroes(b, lb, 1) : o._zeroes(a, -lb, 1));
+        for(i = (la = a.length) == (lb = b.length) ? a.length : ((lb = la - lb) > 0 ? o._zeroes(b, lb) : o._zeroes(a, -lb)).length; i;){
+            if(a[--i] < b[i]){
+                for(j = i; j && !a[--j]; a[j] = 9);
+                --a[j], a[i] += 10;
+            }
+            b[i] = a[i] - b[i];
+        }
+        return c || (o._s ^= 1), o._f = d, o._d = b, o.round();
+    };
+    o.multiply = function(n){
+        var o = new BigNumber(this), r = o._d.length >= (n = new BigNumber(n))._d.length, a = (r ? o : n)._d,
+        b = (r ? n : o)._d, la = a.length, lb = b.length, x = new BigNumber, i, j, s;
+        for(i = lb; i; r && s.unshift(r), x.set(x.add(new BigNumber(s.join("")))))
+            for(s = (new Array(lb - --i)).join("0").split(""), r = 0, j = la; j; r += a[--j] * b[i], s.unshift(r % 10), r = (r / 10) >>> 0);
+        return o._s = o._s != n._s, o._f = ((r = la + lb - o._f - n._f) >= (j = (o._d = x._d).length) ? this._zeroes(o._d, r - j + 1, 1).length : j) - r, o.round();
+    };
+    o.divide = function(n){
+        if((n = new BigNumber(n)) == "0")
+            throw new Error("Division by 0");
+        else if(this == "0")
+            return new BigNumber;
+        var o = new BigNumber(this), a = o._d, b = n._d, la = a.length - o._f,
+        lb = b.length - n._f, r = new BigNumber, i = 0, j, s, l, f = 1, c = 0, e = 0;
+        r._s = o._s != n._s, r.precision = Math.max(o.precision, n.precision),
+        r._f = +r._d.pop(), la != lb && o._zeroes(la > lb ? b : a, Math.abs(la - lb));
+        n._f = b.length, b = n, b._s = false, b = b.round();
+        for(n = new BigNumber; a[0] == "0"; a.shift());
+        out:
+        do{
+            for(l = c = 0, n == "0" && (n._d = [], n._f = 0); i < a.length && n.compare(b) == -1; ++i){
+                (l = i + 1 == a.length, (!f && ++c > 1 || (e = l && n == "0" && a[i] == "0")))
+                && (r._f == r._d.length && ++r._f, r._d.push(0));
+                (a[i] == "0" && n == "0") || (n._d.push(a[i]), ++n._f);
+                if(e)
+                    break out;
+                if((l && n.compare(b) == -1 && (r._f == r._d.length && ++r._f, 1)) || (l = 0))
+                    while(r._d.push(0), n._d.push(0), ++n._f, n.compare(b) == -1);
+            }
+            if(f = 0, n.compare(b) == -1 && !(l = 0))
+                while(l ? r._d.push(0) : l = 1, n._d.push(0), ++n._f, n.compare(b) == -1);
+            for(s = new BigNumber, j = 0; n.compare(y = s.add(b)) + 1 && ++j; s.set(y));
+            n.set(n.subtract(s)), !l && r._f == r._d.length && ++r._f, r._d.push(j);
+        }
+        while((i < a.length || n != "0") && (r._d.length - r._f) <= r.precision);
+        return r.round();
+    };
+    o.mod = function(n){
+        return this.subtract(this.divide(n).intPart().multiply(n));
+    };
+    o.pow = function(n){
+        var o = new BigNumber(this), i;
+        if((n = (new BigNumber(n)).intPart()) == 0) return o.set(1);
+        for(i = Math.abs(n); --i; o.set(o.multiply(this)));
+        return n < 0 ? o.set((new BigNumber(1)).divide(o)) : o;
+    };
+    o.set = function(n){
+        return this.constructor(n), this;
+    };
+    o.compare = function(n){
+        var a = this, la = this._f, b = new BigNumber(n), lb = b._f, r = [-1, 1], i, l;
+        if(a._s != b._s)
+            return a._s ? -1 : 1;
+        if(la != lb)
+            return r[(la > lb) ^ a._s];
+        for(la = (a = a._d).length, lb = (b = b._d).length, i = -1, l = Math.min(la, lb); ++i < l;)
+            if(a[i] != b[i])
+                return r[(a[i] > b[i]) ^ a._s];
+        return la != lb ? r[(la > lb) ^ a._s] : 0;
+    };
+    o.negate = function(){
+        var n = new BigNumber(this); return n._s ^= 1, n;
+    };
+    o.abs = function(){
+        var n = new BigNumber(this); return n._s = 0, n;
+    };
+    o.intPart = function(){
+        return new BigNumber((this._s ? "-" : "") + (this._d.slice(0, this._f).join("") || "0"));
+    };
+    o.valueOf = o.toString = function(){
+        var o = this;
+        return (o._s ? "-" : "") + (o._d.slice(0, o._f).join("") || "0") + (o._f != o._d.length ? "." + o._d.slice(o._f).join("") : "");
+    };
+    o._zeroes = function(n, l, t){
+        var s = ["push", "unshift"][t || 0];
+        for(++l; --l;  n[s](0));
+        return n;
+    };
+    o.round = function(){
+        if("_rounding" in this) return this;
+        var $ = BigNumber, r = this.roundType, b = this._d, d, p, n, x;
+        for(this._rounding = true; this._f > 1 && !b[0]; --this._f, b.shift());
+        for(d = this._f, p = this.precision + d, n = b[p]; b.length > d && !b[b.length -1]; b.pop());
+        x = (this._s ? "-" : "") + (p - d ? "0." + this._zeroes([], p - d - 1).join("") : "") + 1;
+        if(b.length > p){
+            n && (r == $.DOWN ? false : r == $.UP ? true : r == $.CEIL ? !this._s
+            : r == $.FLOOR ? this._s : r == $.HALF_UP ? n >= 5 : r == $.HALF_DOWN ? n > 5
+            : r == $.HALF_EVEN ? n >= 5 && b[p - 1] & 1 : false) && this.add(x);
+            b.splice(p, b.length - p);
+        }
+        return delete this._rounding, this;
+    };
+}
+
+var isNegZero=function(x) {return x===0 && Math.atan2(x,x) < 0}
+
+var _mod = {
+    __getattr__ : function(attr){
+        var res = this[attr]
+        if(res===undefined){$raise('AttributeError','module math has no attribute '+attr)}
+        return res
+    },
+    acos: function(x) {return float(Math.acos(float_check(x)))},
+    acosh: function(x) { 
+        if (_b_.$isinf(x)) return float('inf');
+        var y = float_check(x);
+        return float(Math.log(y + Math.sqrt(y*y-1)));
+    },
+    asin: function(x) {return float(Math.asin(float_check(x)))},
+    asinh: function(x) {
+        if (_b_.$isninf(x)) return float('-inf');
+        if (_b_.$isinf(x)) return float('inf');
+        var y = float_check(x);
+        return float(Math.log(y + Math.sqrt(y*y+1)))
+    },
+    atan: function(x) {
+        if (_b_.$isninf(x)) return float(-Math.PI/2);
+        if (_b_.$isinf(x)) return float(Math.PI/2);
+        return float(Math.atan(float_check(x)))},
+    atan2: function(y,x) {
+        return float(Math.atan2(float_check(y),float_check(x)))
+    },
+    atanh: function(x) { 
+       var y=float_check(x);
+       if (y==0) return 0;
+       return float(0.5 * Math.log((1/y+1)/(1/y-1)));
+    },
+    ceil: function(x) {
+       try{return getattr(x,'__ceil__')()}catch(err){}
+
+       if (_b_.$isninf(x)) return float('-inf')
+       if (_b_.$isinf(x)) return float('inf')
+       if (isNaN(x)) return float('nan')
+
+       var y=float_check(x);
+       if (!isNaN(parseFloat(y)) && isFinite(y)) return int(Math.ceil(y));
+       
+       $raise('ValueError', 'object is not a number and does not contain __ceil__')
+    },
+    copysign: function(x,y) {
+        var x1=Math.abs(float_check(x))
+        var y1=float_check(y)
+        var sign=y1?y1<0?-1:1:1
+        if (isNegZero(y1)) sign=-1   // probably need to work on adding a check for -0
+        return float(x1 * sign)
+    },
+    cos : function(x){return float(Math.cos(float_check(x)))},
+    cosh: function(x){
+        if (_b_.$isinf(x)) return float('inf')
+        var y = float_check(x)
+        if (Math.cosh !== undefined) return float(Math.cosh(y))
+        return float((Math.pow(Math.E,y) + Math.pow(Math.E,-y))/2)
+    },
+    degrees: function(x){return float(float_check(x) * 180/Math.PI)},
+    e: float(Math.E),
+    erf: function(x) {
+        // inspired from 
+        // http://stackoverflow.com/questions/457408/is-there-an-easily-available-implementation-of-erf-for-python
+        var y =float_check(x);
+        var t = 1.0 / (1.0 + 0.5 * Math.abs(y))
+        var ans = 1 - t * Math.exp( -y*y - 1.26551223 +
+                     t * ( 1.00002368 +
+                     t * ( 0.37409196 + 
+                     t * ( 0.09678418 + 
+                     t * (-0.18628806 + 
+                     t * ( 0.27886807 + 
+                     t * (-1.13520398 + 
+                     t * ( 1.48851587 + 
+                     t * (-0.82215223 + 
+                     t * 0.17087277)))))))))
+        if (y >= 0.0) return ans
+
+        return -ans
+    },
+
+    erfc: function(x) {
+        // inspired from 
+        // http://stackoverflow.com/questions/457408/is-there-an-easily-available-implementation-of-erf-for-python
+        var y = float_check(x);
+        var t = 1.0 / (1.0 + 0.5 * Math.abs(y))
+        var ans = 1 - t * Math.exp( -y*y - 1.26551223 +
+                     t * ( 1.00002368 +
+                     t * ( 0.37409196 + 
+                     t * ( 0.09678418 + 
+                     t * (-0.18628806 + 
+                     t * ( 0.27886807 + 
+                     t * (-1.13520398 + 
+                     t * ( 1.48851587 + 
+                     t * (-0.82215223 + 
+                     t * 0.17087277)))))))))
+        if (y >= 0.0) return 1-ans
+        return 1+ans
+    },
+    exp: function(x){
+         if (_b_.$isninf(x)) {return float(0)}
+         if (_b_.$isinf(x)) {return float('inf')}
+         var _r=Math.exp(float_check(x))
+         if (_b_.$isinf(_r)) {throw OverflowError("math range error")}
+         return float(_r)
+    },
+    expm1: function(x){return float(Math.exp(float_check(x))-1)},
+    //fabs: function(x){ return x>0?float(x):float(-x)},
+    fabs: function(x){return _b_.$fabs(x)}, //located in py_float.js
+    factorial: function(x) {
+         //using code from http://stackoverflow.com/questions/3959211/fast-factorial-function-in-javascript
+         var y=float_check(x);
+         var r=1
+         for (var i=2; i<=y; i++){r*=i}
+         return r
+    },
+    floor:function(x){return Math.floor(float_check(x))},
+    fmod:function(x,y){return float(float_check(x)%float_check(y))},
+    frexp: function(x){var _l=_b_.$frexp(x);return _b_.tuple([float(_l[0]), _l[1]])}, // located in py_float.js
+    fsum:function(x){
+        var res = new Number(), _it = _b_.iter(x)
+        while(true){
+            try{
+                var item = _b_.next(_it)
+                res += new Number(item)
+            }catch(err){
+                if(_b_.isinstance(err, _b_.StopIteration)){break}
+                throw err
+            }
+        }
+        return res
+    },
+    gamma: function(x){
+         //using code from http://stackoverflow.com/questions/3959211/fast-factorial-function-in-javascript
+         // Lanczos Approximation of the Gamma Function
+         // As described in Numerical Recipes in C (2nd ed. Cambridge University Press, 1992)
+         var y=float_check(x);
+         var z = y + 1;
+         var d1 = Math.sqrt(2 * Math.PI) / z;
+
+         var d2 = 1.000000000190015;
+         d2 +=  76.18009172947146 / (z+1);
+         d2 += -86.50532032941677 / (z+2);
+         d2 +=  24.01409824083091 / (z+3); 
+         d2 += -1.231739572450155 / (z+4); 
+         d2 +=  1.208650973866179E-3 / (z+5);
+         d2 += -5.395239384953E-6 / (z+6);
+
+         return d1 * d2 * Math.pow(z+5.5,z+0.5) * Math.exp(-(z+5.5));
+    },
+    hypot: function(x,y){
+       if (_b_.$isinf(x) || _b_.$isinf(y)) return float('inf')
+       var x1=float_check(x);
+       var y1=float_check(y);
+       return float(Math.sqrt(x1*x1 + y1*y1))},
+    isfinite:function(x) {return isFinite(float_check(x))},
+    isinf:function(x) {return _b_.$isinf(float_check(x))},
+    isnan:function(x) {return isNaN(float_check(x))},
+    ldexp:function(x,i) {return _b_.$ldexp(x,i)},   //located in py_float.js
+    lgamma:function(x) {
+         // see gamma function for sources
+         var y=float_check(x);
+         var z = y + 1;
+         var d1 = Math.sqrt(2 * Math.PI) / z;
+
+         var d2 = 1.000000000190015;
+         d2 +=  76.18009172947146 / (z+1);
+         d2 += -86.50532032941677 / (z+2);
+         d2 +=  24.01409824083091 / (z+3); 
+         d2 += -1.231739572450155 / (z+4); 
+         d2 +=  1.208650973866179E-3 / (z+5);
+         d2 += -5.395239384953E-6 / (z+6);
+
+         return float(Math.log(Math.abs(d1 * d2 * Math.pow(z+5.5,z+0.5) * Math.exp(-(z+5.5)))));
+    },
+    log: function(x, base) {
+         var x1=float_check(x);
+         if (base === undefined) return float(Math.log(x1));
+         return float(Math.log(x1)/Math.log(float_check(base)));
+    },
+    log1p: function(x) {return float(Math.log(1.0 + float_check(x)))},
+    log2: function(x) {
+        if (isNaN(x)) return float('nan')
+        if (_b_.$isninf(x)) throw ValueError('')
+        var x1=float_check(x)
+        if (x1 < 0.0) throw ValueError('')
+        //if (isLargeNumber(x1)) x1=new BigNumber(x1)         
+        return float(Math.log(x1)/Math.LN2)
+    },
+    log10: function(x) {return float(Math.log(float_check(x))/Math.LN10)},
+    modf:function(x) {
+       if (_b_.$isninf(x)) return _b_.tuple([0.0, float('-inf')])
+       if (_b_.$isinf(x)) return _b_.tuple([0.0, float('inf')])
+       if (isNaN(x)) return _b_.tuple([float('nan'), float('nan')])
+
+       var x1=float_check(x);
+       if (x1 > 0) {
+          var i=float(x1-Math.floor(x1))
+          return _b_.tuple([i, float(x1-i)])
+       }
+
+       var x2=Math.ceil(x1)
+       var i=float(x1-x2)
+       return _b_.tuple([i, float(x2)])
+    },
+    pi : float(Math.PI),
+    pow: function(x,y) {
+        var x1=float_check(x)
+        var y1=float_check(y)
+        if (y1 == 0) return float(1)        
+        if (x1 == 0 && y1 < 0) throw _b_.ValueError('')
+
+        if(isNaN(y1)) {if(x1==1) return float(1) 
+                       return float('nan')
+        }
+        if (x1 == 0) return float(0)
+
+        if(_b_.$isninf(y)) {if(x1==1||x1==-1) {return float(1)}
+                       if(x1 < 1 && x1 > -1) return float('inf') 
+                       return float(0)
+        }
+        if(_b_.$isinf(y)) {if(x1==1||x1==-1) {return float(1)} 
+                      if(x1 < 1 && x1 > -1) return float(0) 
+                      return float('inf')}
+
+        if(isNaN(x1)) return float('nan')
+        if(_b_.$isninf(x)) {
+            if (y1 > 0 && isOdd(y1)) return float('-inf')
+            if (y1 > 0) return float('inf')  // this is even or a float
+            if (y1 < 0) return float(0)
+            return float(1)
+        }
+
+        if(_b_.$isinf(x)) { 
+            if (y1 > 0) return float('inf')
+            if (y1 < 0) return float(0)
+            return float(1)
+        }
+
+        var r
+        if (isLargeNumber(x1) || isLargeNumber(y1)) {
+           var x=new BigNumber(x1)
+           var y=new BigNumber(y1)
+           r=x.pow(y)
+        } else {
+           r=Math.pow(x1,y1)
+        }
+
+        if (isNaN(r)) return float('nan')
+        if (_b_.$isninf(r)) return float('-inf')
+        if (_b_.$isinf(r)) return float('inf')
+
+        return r
+    },
+    radians: function(x){return float(float_check(x) * Math.PI/180)},
+    sin : function(x){return float(Math.sin(float_check(x)))},
+    sinh: function(x) { 
+        //if (_b_.$isinf(x)) return float('inf');
+        var y = float_check(x)
+        if (Math.sinh !== undefined) { return float(Math.sinh(y))}
+        return float((Math.pow(Math.E,y) - Math.pow(Math.E,-y))/2)
+    },
+    sqrt : function(x){
+      var y = float_check(x)
+      if (y < 0) { throw ValueError("math range error")}
+      if (_b_.$isinf(y)) return float('inf')
+      var _r=Math.sqrt(y)
+      if (_b_.$isinf(_r)) {throw OverflowError("math range error")}
+      return float(_r)
+    },
+    tan: function(x) {
+        var y = float_check(x)
+        return float(Math.tan(y))
+    },
+    tanh: function(x) {
+        var y = float_check(x)
+        if (Math.tanh !== undefined) return float(Math.tanh(y))
+        return float((Math.pow(Math.E,y) - Math.pow(Math.E,-y))/
+                     (Math.pow(Math.E,y) + Math.pow(Math.E,-y)))       
+    },
+    trunc: function(x) {
+       try{return getattr(x,'__trunc__')()}catch(err){}
+       var x1=float_check(x);
+       if (!isNaN(parseFloat(x1)) && isFinite(x1)) {
+          if (Math.trunc !== undefined) { return int(Math.trunc(x1))}
+          if (x1 > 0) {return int(Math.floor(x1))}
+          return int(Math.ceil(x1))  // x1 < 0
+       }
+       $raise('ValueError', 'object is not a number and does not contain __trunc__')
+    }
+}
+
+for(var $attr in _mod){
+    if(typeof _mod[$attr]==='function'){
+        _mod[$attr].__repr__=(function(func){
+            return function(){return '<built-in function '+func+'>'}})($attr)
+        _mod[$attr].__str__=(function(func){
+            return function(){return '<built-in function '+func+'>'}})($attr)
+    }
+}
+
+return _mod
+
+})(__BRYTHON__)