let all_entities take a location array
Merge pull request #87 from jb-aero/pullable

let all_entities take a location array
Added inventory stuff.
Merge pull request #86 from EntityReborn/master

Added inv stuffs to support an extension.
added creature_spawn event, added a prefilter to PIE, fixed an NPE with target_player, and fixed some failing tests
Merge pull request #88 from jb-aero/master

Added creature_spawn event, added a prefilter to PIE, fixed an NPE with...
Made AssertPlayerNonNull after the player has been set.