added some assets, such as converted enemy sprites
Merge pull request #2 from mfbadr/menu

added some assets, such as enemy gifs converted to sprites
tweak coin behavior
goomba var dec to main.js
more coins
added level1music
Merge branch 'master' of https://github.com/mfbadr/duper-mario into dennis

Conflicts:
	public/js/menu.js