Issue #306 : Switch implementation for memoizer

src/js/utils/FunctionUtils.js

@@ -0,0 +1,16 @@
+(function () {
+  var ns = $.namespace('pskl.utils');
+
+  ns.FunctionUtils = {
+    memo : function (fn, cache, scope) {
+      var memoized = function () {
+        var key = Array.prototype.join.call(arguments, '-');
+        if (!cache[key]) {
+          cache[key] = fn.apply(scope, arguments);
+        }
+        return cache[key];
+      };
+      return memoized;
+    }
+  };
+})();