You can clone with
HTTPS or Subversion.
It'd be best to allow the bundle to be selected/installed from the Bundle preference pane of TM2. That would make installation even easier.
Any idea how I do that?
So, none other than Allan Odgaard himself posted a patch which made this bundle work correctly in TextMate 2. However, I don't see it listed in the Bundles pane of that app and have no idea how to get it there. Help?
It kinda works for me. I cloned repo into ~/Library/Application Support/Avian/Bundles and renamed into Go.tmbundle. Also I removed indentation rules as done there.