Complete revamp of how cooldowns are handled

Now stores on a per player basis instead of a per ability basis. The
bendingPlayer class will store cooldowns for ALL abilities except for
the AvatarState.
1.4.0 BETA 7
Cleaned up Imports
/bending who can work on offline players
Add /bending give

Allows giving of bending specific items. (Like the grappling hook)
Add /bending invincible

Makes you invincible to Bending damage.
AirSwipe will stop when it hits another blast
NoCheatPlus Support

The damage thing shouldn't be thrown when a player uses Bending to
attack
Possible Cooldown Fix
1.4.0 BETA 8