TurnBasedBattle is now working, but unstable.

Turn based battle in Minecraft is working on a very basic level. Health
still regenerates in real time, there are no chances for anyone to miss an
attack, status effects are not used or affected, creeper attacks are not
handled yet, etc...
Merge branch 'master' of https://github.com/BurnedKirby/Minecraft-Turn-Based-Battle-Mod