animation angefangen.... aber noch falsche pics
update sprites.json
add new invaders sprite
Merge branch 'master' into aliens2

Conflicts:
	app/data/sprites.json
	app/scripts/levels.js
	app/scripts/models.js
Merge branch 'master' into aliens2

Conflicts:
	app/scripts/models.js
scale und animation hinzugefgt
model aenderung
.
merge master to aliens2
vor checkout
add explosion.ogg, cannon test
bewegung angepasst
bewegung noch angepasst
Merge branch 'aliens2'

Conflicts:
	app/scripts/main.js
	app/scripts/models.js
	app/styles/main.css
Merge branch 'aliens2'

Conflicts:
	app/scripts/main.js
	app/scripts/models.js
	app/styles/main.css
fix build script for distribution
add heroku procfile
initial dist subtree commit
update readme
clean up sprites