Store best score in localStorage

Dependency injection and hide best score for incompatible browsers
Fix win/over in local
localStorage fallback
Merge remote-tracking branch 'upstream/master' into best-score

Conflicts:
	index.html
	js/application.js
	js/html_actuator.js
Use querySelector instead of getElementsByClassName
Merge pull request #22 from ghoullier/master

Use querySelector instead of getElementsByClassName
fix merge conflict
add small code tweaks
mobile tweaks for best score
fix conflict
remove analytics from master branch
Merge branch 'master' into gh-pages
restore ga in gh-pages