Converted all counting tests to be stronger.
Converted all counting tests to be stronger.

Now I am checking for what listeners were executed / removed etc, not
just the amount of listeners executed. I was hoping this would flag up
some issues I could fix, looks like I wrote this better that I
originally thought.

Everything seems fine even after checking a lot more. What a nice
surprise.

This is part of #51

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