Mob Drop Stopper

Will now only block / replace drops by mobs (monster or animal) as intended, but not other entities (fixes a problem with player inventories being edited on death - as well as some other possible problems not initially foreseen).

Cannot be set to edit drops by other entities besides mobs as of this point.

(Note: This has been tested on Minecraft 1.8 and 1.6, it probably works with version in between at least, but has not been tested specifically on other version; has been tested with Craftbukkit and Cauldron, but not Spigot.)