I did a bunch of changes and ported the old versions over.
You can follow the first link in the update log to read a lengthier post about this update.

This imgur leads you to screenshots of the different versions.
http://imgur.com/a/xylsT

If you find bugs or issues please share them on GitHub.

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Log of recent changes (copied from tf.tv):

- Recent major update post: http://teamfortress.tv/thread/8336/yahud/?page=23#676

- New Pip-Poy: http://imgur.com/a/8oq2b

- Added Mac OS support (separate font files)

- New respawn timer: http://i.imgur.com/XZfTtTB.jpg

- New Backpack screen: http://i.imgur.com/CE28c2u.jpg

- Added mx version: http://imgur.com/a/9mJdY

- Added c & cx versions: http://imgur.com/a/xp4C4/

- Updated MvM