Merge pull request #247 from jaoo/1085485

Bug 1085485 - [Loop][Build] Add grunt tasks to generate release and push to the device. r=jaoo
(cherry picked from commit b2ca1de82498cdf92cab82fa68c347720b21b926)

Conflicts:
	README.md
	app/js/version.js
Merge pull request #248 from jaoo/1085485-followup

Bug 1085485 - [Loop][Build] Add grunt tasks to generate release and push to the device (follow-up). r=jaoo
(cherry picked from commit 637c5e0be0fe37ebe96fd3afc119bf873d1f7a4a)