+ wip - tests for Instance IDs.

+ Test (_.py) - ID each Entity class by name.
May:
* Contains __all__, which has every single
sub-class contained keyed by their name.
* Makes an incremental ID for each sub-class.

! tile_key > tile_lock
each key has it's own lock
on collection, the key opens the lock

IDs
! identify each other by their IDs
+ ID is int, incremented for each new class

! graphic
easy identification for the level editor