Fixed failing spec due to backbone upgrade

_listeners has been changed to _listeningTo.

[See diff](jashkenas/backbone@1.0.0...1.1.0#diff-0d56d0d310de7ff18b3cef9c2f8f75dcL154)

Author: jmorrell

spec/javascripts/collectionView.reset.spec.js

@@ -56,7 +56,12 @@ describe("collection view - reset", function(){
     });
 
     it("should remove the event handlers for the original children", function(){
-      expect(_.size(collectionView._listeners)).toBe(4);
+      // maintain backwards compatibility with backbone 1.0.0 in tests
+      if (typeof collectionView._listeningTo != "undefined") {
+        expect(_.size(collectionView._listeningTo)).toBe(4);
+      } else {
+        expect(_.size(collectionView._listeners)).toBe(4);
+      }
     });
   });