[MERGE] Update PPA documentation and scripts

[Martin Pool]

bb: tweak

s/contro/control/
(I think your 'control' key is broken :-)


+   The must supply the versions as arguments as follows

Typo?  'You must'?

Thanks for updating this.

Maybe UBUNTU_RELEASES should be put into one of the scripts?  It
changes much more slowly than we release packages.

Also, we should now try to build on karmic.  If that's not currently
supported by the ppa pbuilders, it soon will be.

-- 
Martin <http://launchpad.net/~mbp/>