. updated docs (entity generation tools)

! entity tool generator

PROBLEM:
For every new entity, it needs a new tool.
Making a new tool requires a lot of small core code changes peppered
around the toolbox.

Additionally, every new tool for each entity,
unnecessarily creates a new entity tool for
a new name.

SOLUTION:
x when new entities are added,
they're automatically given a tool

x Too difficult and implict
x read from the entities module,
take class names
! ignore "entity", "entities" and "entity_room"

! provide a list of entities in the __init__

! modules are loaded from it: __init__ use
! level_editor automatically grabs names