ng-cloack may need angular injected in <head>

Just a detail about "exclude" config parameter used when angular is not jet loaded so it cant hide the ```ng-cloack``` elements.
[https://code.angularjs.org/1.2.26/docs/api/ng/directive/ngCloak](https://code.angularjs.org/1.2.26/docs/api/ng/directive/ngCloak) suggest to inject angular into the <head>