git branch changes!

git branch changes!

[Sage Weil]

We've switched around the git branch names to be a bit less strange.  
They've all changed names, so you shouldn't get any surprises in the old 
branches.

 master - current unstable work.  this is the default when you clone.
 stable - last release, plus any bug fixes.
 next   - next release (once it's forked off of master); may not always 
          exist.

If you're after a release, look at the git tags.

There's likely a fair bit of stale documentation now in the wiki and 
elsewhere; if you see it, please fix or mention it so someone else can.

Thanks!
sage