fix(input): bind inputs to the 'input' event

The input event is fired on all non-ie browsers whenever the contents of an input
field changes. This means that we now support cut&paste via mouse which
was previously unsupported.

IE8 and older don't support this events and IE9 has a problematic
support for it, so we can't rely solely on this event and drop keydown
and change events.

src/widget/input.js

@@ -817,7 +817,7 @@ angularWidget('input', function(inputElement){
           inputElement.val(widget.$viewValue || '');
         };
 
-        inputElement.bind('keydown change', function(event){
+        inputElement.bind('keydown change input', function(event) {
           var key = event.keyCode;
           if (/*command*/   key != 91 &&
               /*modifiers*/ !(15 < key && key < 19) &&