Merge pull request #7 from ck300/master

Added modifier.duration and modifier.expire_time
Added inventory, item class
Merge pull request #8 from thehellbean/master

Added inventory, item class
Added item class automodule
Merge pull request #9 from thehellbean/patch-1

Added item class automodule
Fixed referencing the wrong class in automodule
Added wildcard to register (hopefully) all items
Merge pull request #1 from thehellbean/patch-2

Fixed referencing the wrong class in automodule
Merge pull request #10 from thehellbean/master

Added wildcard to item class register, fixed automodule
Moved entity creation out of properties.py into entities.py
Made entities hashable
Added get_all_heroes to Hero class
Merge branch 'master' of https://github.com/skadistats/Tarrasque