Upcoming changes in the git repository

[Mike Hommey]

Hi,

I'm going to remove the debian branch on the git repository, and create
2 new branches: debian/unstable and debian/experimental, to keep track
of both branches currently in the archive. Please track these branches
from now on.

Mike

PS: also note the current 0+svn29752-1 tag is wrong and is going to be
rewritten.
PPS: Ultimately, the whole repo will be rewritten to track upstream git
instead of svn.