[WIP] Angular framework merge

PR to merge an angular scaffold into the project. Changes:

* [X] Gulp replaces Grunt
* [X] Angular + Front matter functionality
* [X] Angular scaffold imports correct files
* [X] Readme update explaining some of the angular features
* [X] Bower/Package.json updates
* [ ] Docs converted into the AngularJS scaffold
* [ ] new styles used in the scaffold