Merge pull request #9 from nicolas-cusan/master

Add `var` keyword

Author: ivopetkov

responsivelyLazy.js

@@ -5,7 +5,7 @@
  * Free to use under the MIT license.
  */
 
-responsivelyLazy = (function () {
+var responsivelyLazy = (function () {
 
     var hasWebPSupport = false;
     var windowWidth = null;