feat(angularCoffee): create snippets for controller and scope methods.

- [x] Create snippet for angular controller
- [x] Create snippets for scope methods:

     - [x] scope function
     - [x] scope variable
     - [x] scope variable variant 2
     - [x] scope $watch
     - [x] scope $on
     - [x] scope $broadcast
     - [x] scope $emit