Added an intro to the guide. Using master branch links because that is where it will be soon.
Added an intro to the guide. Using master branch links because that is where it will be soon.

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