feat(angularCoffee): create snippets collection for Angular using Coffeescript

Things TODO before release:

- [ ] Create snippet for angular directives
- [ ] Create snippet for angular controllers
- [ ] Create snippet for angular services
- [ ] Create snippet for angular factories
- [ ] Create snippet for angular filters
- [ ] Create snippet for angular routes
- [ ] Create snippets for other angular methods and functions.
- [ ] ...
- [ ] Cleanup branch and make ready for release.