Started setting up events for mods to recieve CustomPayload packets.

Currently untested.
* Got events working
+ Added ApiNetwork for sending packets.
* Some fixes for ApiNetwork...
+ Added Key events
  + eventKeyDown
  + eventKeyUp
  + eventKeyHeld
Lots of notes read below.
+ Added EntityList changes to forge version
+ Added KeyEvent hooks to forge version
+ Added some more docs to ApiNetwork
+ Added notes on needed changes for forge version
Merge pull request #48 from Sollace/NetworkingBranch2

More events and stuff