Remove legay.js since we're about to hit 2015.

Closes #592

src/core/PaperScript.js

@@ -393,7 +393,7 @@ Base.exports.PaperScript = (function() {
             // functions:
             // https://code.google.com/p/chromium/issues/detail?id=331655
             var script = document.createElement('script'),
-                head = document.head;
+                head = document.head || document.getElementsByTagName('head')[0];
             // Add a new-line before the code on Firefox since the error
             // messages appear to be aligned to line number 0...
             if (browser.firefox)

src/legacy.js

@@ -1,23 +0,0 @@
-/*
- * Paper.js - The Swiss Army Knife of Vector Graphics Scripting.
- * http://paperjs.org/
- *
- * Copyright (c) 2011 - 2014, Juerg Lehni & Jonathan Puckey
- * http://scratchdisk.com/ & http://jonathanpuckey.com/
- *
- * Distributed under the MIT license. See LICENSE file for details.
- *
- * All rights reserved.
- */
-
-// Support for legacy browsers (mainly FF 3.6). Remove 2nd half of 2014?
-
-if (!Array.isArray) {
-    Array.isArray = function(obj) {
-        return Object.prototype.toString.call(obj) === '[object Array]';
-    };
-}
-
-if (!document.head) {
-    document.head = document.getElementsByTagName('head')[0];
-}

src/paper.js

@@ -40,10 +40,6 @@ var paper = new function(undefined) {
 /*#*/     include('../bower_components/stats.js/build/stats.min.js');
 /*#*/ }
 
-/*#*/ if (__options.legacy) {
-/*#*/     include('legacy.js');
-/*#*/ }
-
 /*#*/ if (__options.version == 'dev') {
 /*#*/     include('constants.js');
 /*#*/ }