Procrastination

Very little of importance.
- Initial layer system for sanity. Most things are missing their layers,
so the world is a bit broken.
- Editor hub added for accessing common functions.
- Birdsong test to see how Unity's audio stuff works.
- Weather has been disabled until I get the screen-space stuff to work.
May be redundant if I change the season, but a good post layer will be
useful no matter what.