Add aliases for some functions
Add aliases for some functions

This mirrors the Backbonejs events API and to a lesser extent the
Nodejs events API.

on() = addListener()
off() = removeListener()
trigger() = emitEvent()

Olical/EventEmitter,oculus42/EventEmitter,Olical/EventEmitter,Wolfy87/EventEmitter,modulexcite/EventEmitter,oculus42/EventEmitter,Olical/EventEmitter,modulexcite/EventEmitter,Wolfy87/EventEmitter