Find a solution to re-enable mangling option for grunt build.

[pilwon]

No description provided.

[yaru22]

ngmin is not working seamlessly with our project setup.

For example, if I run ngmin on one of our controllers (e.g. auth/controllers/login.js), this is what we get:

exports = module.exports = function (ngModule) {
  ngModule.controller('LoginCtrl', function ($scope, alert, auth, layout) {
    ...
  });
}

The dependencies are not annotated correctly because ngmin doesn't know that ngModule is angular.module(...) since it's coming from external source.

I think this work (btford/ngmin/pull/61) can be used for our purpose as well once it's pulled.

Also, see http://craigbeck.github.io/blog/2013/12/11/ui-dot-router-gotcha/ and btford/ngmin#54.