Updating D3 to 3.5.2.

bower.json

@@ -23,6 +23,6 @@
     "tests"
   ],
   "dependencies": {
-    "d3": "~3.4.4"
+    "d3": "^3.5.2"
   }
 }

c3.js

@@ -6801,14 +6801,6 @@
         return axis;
     }
 
-    // fix problems using c3 with phantomjs #578
-    Function.prototype.bind = Function.prototype.bind || function (thisp) {
-        var fn = this;
-        return function () {
-            return fn.apply(thisp, arguments);
-        };
-    };
-
     if (typeof define === 'function' && define.amd) {
         define("c3", ["d3"], c3);
     } else if ('undefined' !== typeof exports && 'undefined' !== typeof module) {