Bug 838110 - made pick.js testable
Bug 838110 - load list.json to get wallpaper list
Bug 838110 - Wallpaper and ringtones customization

Conflicts:
	build/utils.js
Bug 838110 - fallback to filename when l10n of ringtone unavailable
Merge pull request #8264 from yurenju/wallpaper-v1-train

Wallpaper v1 train