l10n fixes

Fixed notification alerts for non-latin langs
Fixed X minutes ago, X hours ago for non (one|many) plural languages
Added italian langpack from Transifex
Syncronized all langpacks with Transifex
Merge branch 'master' of https://github.com/zhukov/webogram

Conflicts:
	app/js/locales/de-de.json
	app/js/locales/es-es.json