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
Increased win value to 8192
add mentions to readme
add screnshot section
Not maintaining this further, so not accepting contributions.
Change README title, leave attribution.
Merge upstream changes.
Merge branch 'master' into gh-pages