Git repo for octave-control slightly messed up

[Rafael Laboissière <rafael@debian.org>]

I messed up a little bit with the Git repo for octave-control because I 
did my changes, uploaded version 3.1.0-1 to unstable and pushed my 
commits without noticing that Sébastien had already done some commits. 
This is the reason I uploaded version 3.1.0-2 also.

The tags/branches seem to be positioned correctly now and I hope that my 
extraneous branching/merging will not interfere with the functioning of 
git-buildpackage in the future.

Rafael