Adds game JSON WIP.
Merge branch 'master' of github.com:wilkie/apsis
Adds Wiggler mover agent.
Movers .actor to .json and adds type and adds things.

Moved actors to JSON and added things collection to hold the base actors. You can now inherit actors from existing ones. This allows you to derive objects from existing games/if.
Implements Scene class and Thing class inherit feature.

Soon, we will use the Scene class to collect objects and metadata about the objects and Things in the World. The Thing class now can inherit so that base objects can have no rules and new objects can have defined rules more easily.
Adds ctags metadata generation to Makefile task.

ctags will be good for documentation and dev efforts for apsis.