MilkBukkit Changes

> Initial setup
> Removed Fix-StructureGrowEvent.getPlayer.patch

+ Update POM to reflect MilkBukkit
+ Tab list control
+ Fix changing inventories
+ Make items less intensive
+ Add super metadata
+ Remove block tick, PlayerDropItemEvent upgrade
+ Lighten server tick load
+ Fix changing inventories patch
+ Reduce super metadata to entities only
+ Remove itemstack AttributeModifiers
+ Make entities move smoother
+ Remove player.dat saving