rayIntersect is now in game
Moved game world into its own class, added random
Custom classes for all UserData; towards custom renderer
remove debugDraw
simple culling with render; render only visible blocks
make visibility check much better
fix a small rendering bug and caching bug
seeded random
add browserify
Merge branch 'master' into refactor

Conflicts:
	coffee/game/player_body.coffee
	coffee/game/renderer.coffee
	coffee/game/setup_game.coffee
	coffee/utils.coffee
	package.json
removed node_modules