Bootstrap Xtra extends Bootstrap

  "Xtra Features: Icon Buttons."

Is this all it adds? Bootstrap already supports adding icons to buttons..

edit: Actually, the Github page for Bootstrap Xtra[1] says "DEPRECATED - Use Font-Awesome or Font-Awesome-More"

[1] https://github.com/lightglitch/bootstrap-xtra

what benefits does this provide vs the latest bootstrap 2? I couldn't find any besides some more icons, which you can get with font awesome

Looks pretty old, this may be a dead project