Merge pull request #215 from ferjm/grunt

Bug 1085300 - [Loop][Testing] Basic test infrastructure with grunt. r=jaoo
(cherry picked from commit f83a3c5aa90c0f78a8047c7efadace01ad01325b)

Conflicts:
	app/compatibility.json
	app/js/compatibility_checker.js
	app/locales/date/date.it.properties
	app/locales/loop.it.properties
	js/version.js