Merge pull request #897 from dcneiner/jquery-zepto-context

Made minor optimization to scoped jQuery/Zepto method $ on the Backbone.View

backbone.js

@@ -984,7 +984,7 @@
     // jQuery delegate for element lookup, scoped to DOM elements within the
     // current view. This should be prefered to global lookups where possible.
     $: function(selector) {
-      return $(selector, this.el);
+      return this.$el.find(selector);
     },
 
     // Initialize is an empty function by default. Override it with your own