refactor(sprites): grunt spritesmith for @sabrecat's e44c84bef9

dist/habitrpg-shared.js

@@ -27,8 +27,7 @@ process.nextTick = (function () {
     if (canPost) {
         var queue = [];
         window.addEventListener('message', function (ev) {
-            var source = ev.source;
-            if ((source === window || source === null) && ev.data === 'process-tick') {
+            if (ev.source === window && ev.data === 'process-tick') {
                 ev.stopPropagation();
                 if (queue.length > 0) {
                     var fn = queue.shift();
@@ -64,7 +63,7 @@ process.chdir = function (dir) {
 };
 
 },{}],3:[function(require,module,exports){
-var global=typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {};/**
+var global=self;/**
  * @license
  * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
  * Build: `lodash modern -o ./dist/lodash.js`