Ctrl+Tab/Shift+Ctrl+Tab switching

Supported TDesktop-like conversations switching for packed mode
Closes #496
Improved index meta tags
Saving Chrome app window position
Synchronize langpacks with Transifex
Fixed gif in packed mode

Closes #495
Improved IE compatibility

Added bad browser page
Organized scripts
Upgraded angularJS to v1.3.0-rc.4
Improved android home icon
Improved lang footer
Fixed tg-range slider
Added language for mobile settings
Update version
Fixed favicon replacement

Closes #500
Improved bad browser page

Fixed some l10n bugs
Fixed polyfill in production
Bump to 0.3.1 + Changelog
Improved search esc behaviour
Improved mobile intro

Synchonized langpacks
Supported GIF download
Minor bugfixes
Added disabled local storage workaround