Created a cancellable event that will fire whenever a bending move would
alter the velocity of an entity.
## Additions
* Adds 1.
> The AbilityVelocityAffectEntityEvent
> Adds a new method to GeneralMethods -> setEntityVelocity()
> Updates existing setVelocity() calls to use the new method in general methods.
> checks to see if anything in the event should be modified or if it should be cancelled.
## Fixes
* Fixes 2
> The lack of a way to detect when a bending move pushed a player.
