Add a progress bar on the UI

lib/tools/phantomas/phantomasWrapper.js

@@ -79,6 +79,12 @@ var PhantomasWrapper = function() {
                 deferred.reject('Phantomas failed: ' + res.message);
             });
 
+        promise.on('milestone', function(event) {
+            if (event === 'domReady' || event === 'domComplete') {
+                deferred.notify(event);
+            }
+        });
+
         return deferred.promise;
     };
 };