Update OnGroundAPI, fixes #13
Update to the latest CraftBukkit changes
Fix a few missed imports
Fix the pressure plate fix
Only send overhead name updates to the player's world
Update PressurePlateFix

We don't need to worry if the pressure plate is turning on/off because our fix caches the necessary data to determine wether or not the event should fire.
Add a Scoreboard API (no vanilla command yet)
Don't filter out negative data values

Also, fix setting player teams