Update to 1.4.6

Audio notes (opus codec)
A lot of different improvements and bug fixes

Thanks to:
https://github.com/DrKLO/Telegram/issues/293
https://github.com/DrKLO/Telegram/issues/256

FOSS configuration not ready yet

I will move main dev branch to github in next couple commits
Preparation to move dev branch to github

yep, it's finally here
one more gitignore
remove main thread block before recording audio
fixed previous commit
update to 1.4.7

Pebble notifications (thanks to
https://github.com/DrKLO/Telegram/pull/318)
Fixed native lib load on android 4.0
Merge branch 'dev'
Fixed previous commit
Merge branch 'dev'
Revert italian localization to previous release, add some new strings
Check if native lib loaded before opening db
Update group chat creation interface
Ability to set language in settings
Addition to previous commit
Merge branch 'dev'
Icon for group chats in messages list

(DEBUG) Option in settings to switch to test datacenters
Update some images
Merge branch 'master' into dev
Fixed possible crashes
Fixed photo sharing on devices with low memory
Add giflib and GifDrawable