Merge version 3.0.0~b1-2ubuntu1 (universe) from Debian unstable 3.0.0~b3-1

Ubuntu component: universe
Debian component: Main

Remaing ubuntu changes:
       * debian/rules: don't use fixed pyversion for building docs
       * debian/control: changed Maintainer field, set to Ubuntu Motu.

All other Ubuntu changes could be dropped, cause present in debian package.

   * debian/rules:
       - clean target, remove workaround for cdbs bug, which is fixed already
       - Do not remove setup.cfg from PyOpenGL.egg-info/SOURCES.txt.
         I could not find a reference why it was added and other packages
         do not remove it, too.
   * changelog: removed spurious file
   * debian/rules: don't use fixed pyversion for building docs

In particular, about removing setup.cfg from PyOpenGL.egg-info/SOURCES.txt, i contacted the involved DD, and that's the feedback:
http://lists.debian.org/debian-python/2008/07/msg00023.html
That means also that from the next debian revision, we'll be in sync.