* New upstream release:
  - removed build-extensions.patch, applied upstream,
  - removed quilt dependency, unused.
  - removed README.source, no more quilt.
* Switched to debian-support:
  - added preinst script to de-register from pycentral.
* Standards-Version bumped to 3.8.1, no changes needed.
* python-all-dev build-dependency relaxed to python, as no binary
  modules are built.