feature(DOM): Experiment w/ excluding 'ng-scope' and 'ng-isolate-scope' classnames from elements

Ultimate goal is to reduce DOM manipulations. It appears 'ng-scope' and
'ng-isolate-scope' classnames are not required for Angular to work. So
in an effort to reduce any DOM manipulations, we’re going to try to
excluding them from being added to elements and see what comes of it.

js/ext/angular/src/service/angularOverrides.js

@@ -1,7 +1,7 @@
 
 angular.element.prototype.addClass = function(cssClasses) {
   var x, y, cssClass, el, splitClasses, existingClasses;
-  if (cssClasses) {
+  if (cssClasses && cssClasses != 'ng-scope' && cssClasses != 'ng-isolate-scope') {
     for(x=0; x<this.length; x++) {
       el = this[x];
       if(el.setAttribute) {