Add Array.fill polyfill

package.json

@@ -1,7 +1,7 @@
 {
   "name": "topolis",
   "description": "JavaScript topology representation and manipulation",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "author": "Björn Harrtell <bjorn@wololo.org>",
   "keywords": [
     "JSTS",

src/Array.js

@@ -0,0 +1,36 @@
+/* Polyfill service v3.13.0
+ * For detailed credits and licence information see http://github.com/financial-times/polyfill-service
+ *
+ * - Array.prototype.fill, License: CC0 */
+
+if (!('fill' in Array.prototype)) {
+  Object.defineProperty(Array.prototype, 'fill', {
+    configurable: true,
+    value: function fill (value) {
+      if (this === undefined || this === null) {
+        throw new TypeError(this + ' is not an object')
+      }
+
+      var arrayLike = Object(this)
+
+      var length = Math.max(Math.min(arrayLike.length, 9007199254740991), 0) || 0
+
+      var relativeStart = 1 in arguments ? parseInt(Number(arguments[1]), 10) || 0 : 0
+
+      relativeStart = relativeStart < 0 ? Math.max(length + relativeStart, 0) : Math.min(relativeStart, length)
+
+      var relativeEnd = 2 in arguments && arguments[2] !== undefined ? parseInt(Number(arguments[2]), 10) || 0 : length
+
+      relativeEnd = relativeEnd < 0 ? Math.max(length + arguments[2], 0) : Math.min(relativeEnd, length)
+
+      while (relativeStart < relativeEnd) {
+        arrayLike[relativeStart] = value
+
+        ++relativeStart
+      }
+
+      return arrayLike
+    },
+    writable: true
+  })
+}

src/topolis.js

@@ -3,6 +3,8 @@
  * @module
  */
 
+import './Array'
+
 export {
   /**
    * @type {module:topo.createTopology}