Add Feed Bag object

Add FeedBag object with tests, also add code to post the didDie
notification when a chicken lays 36 eggs.
Add refill test.
Add water bottle & egg crate
Add Nest and tests.
Reset eggCount after hatching an egg.
Add Farmer object and tests.
Build out Farmer object (passes all tests).
Add equal(health(), 0) to did_die black-box test.
Fix up test comment.
Add FryPan object.
Merge branch 'master' into game-entities
Logic to eat eggs only when 60% health or less.
Add all scripts.
Add back missing script.
Add GamePiece, UUID.
Remove unused local .js
Make all game pieces inherit from GamePiece
Use new processGameTick()

Update FryPan and Nest objects to use new processGameTick() API. Also
add Egg object.
Add over-cooked test.
Restructure GamePiece to vend fixture & body