Cryptocat 2.1 (pending public release)

This is a major update to Cryptocat with many improvements and bug
fixes.

- User Interface redesign: Cryptocat's user interface has been
redesigned to be brighter, friendlier, and faster. Existing users will
find the new design familiar enough use, while new users will benefit
from a friendlier user experience.
- Encrypted file sharing: Send files via Cryptocat. ZIP files as well
as images can now be shared with people inside a chatroom.
- Security enhancements and bug fixes. Updating is recommended.
- Major code cleanup and optimizations, including many bug fixes.
- Added 41 new interesting cat facts.
- Updated jQuery to 2.0.2.
- Updated OTR libraries to version 0.1.5.

**Known issues**: Safari users are currently able to send but not
receive files. The Uighur translation is also currently unavailable and
will return in a future version.