UI changes

Chunk generating changes
Merge branch 'master' of https://github.com/brdunfield/GGJ2014

Conflicts:
	character.js
	engine.js
Merge branch 'master' of https://github.com/brdunfield/GGJ2014
Fixzing the ground getting deleted
Merge branch 'master' of https://github.com/brdunfield/GGJ2014