Added mousewheel support for touch devices

Author: lewisl9029

js/views/scrollView.js

@@ -885,6 +885,7 @@ ionic.views.Scroll = ionic.views.View.inherit({
       document.addEventListener("touchmove", self.touchMove, false);
       document.addEventListener("touchend", self.touchEnd, false);
       document.addEventListener("touchcancel", self.touchEnd, false);
+      document.addEventListener("wheel", self.mouseWheel, false);
 
     } else if (window.navigator.pointerEnabled) {
       // Pointer Events