add ui-bootstrap and materials

2 new things :

- Add an optional question if you choose Bootstrap to ask if you want to add UI-Bootstrap, AngularStrap, the standard JS files of Bootstrap or nothing

- Add Angular Material in the UI Framework question
Not neccesary. Instead you can use `this._` at https://github.com/Swiip/generator-gulp-angular/pull/137/files#diff-2018087f584c4398b5c3a23fc0e5f9dbR61