Fix Earth Armor Dupe Bug

Make Packed Ice Bendable
Actually make Packed Ice Bendable
Build to CraftBukkit, Not Spigot

Fixes ambiguous methods.
AvatarState Changes

I'm working on making AvatarState more playable. That said, instead of
their being no warmup time on AirBurst, ShockWave, FireBurst, and
Lightning, it is now 1/3 of what it would be otherwise.
More AvatarState Changes

Remove Toggleable AirShield and FireJet. (These were broken, again,
trying to make the mode usable)