Added recipe for building supervisor DEB packages from github as a source

Supervisor is a client/server system that allows its users to monitor and control a number of processes on UNIX-like operating systems.

This particular recipe has one kludge (noted by a comment in recipe.rb) which serves to work around a bug mentioned here https://github.com/Supervisor/supervisor/issues/151 (installing setuptools-git didn't help and I'm far from being friends with python ;]). 

Additionally, this recipe would need some work done for building RPM package from. At least at recipe.rb:24
```ruby
safesystem 'python setup.py install --single-version-externally-managed --root=../../tmp-dest --no-compile --install-layout=deb'
```