Merge pull request #1 from bteixeira/master

Fixed for new versions of Jade.
refactored to use browserified irf
added irf as bower dependency
new irf version, stronger gravity
adapt to recent irf refactoring
added hexagonal map
reading map data form literal object (in hexagon example)
Merge remote-tracking branch 'upstream/master'

Conflicts:
	.gitignore
	assets/js/asteroids.coffee
	assets/js/irf.js
	assets/js/scenes/iso.coffee
	assets/js/scenes/jumpnrun.coffee
Pulled from upstream