avocado/version.py: Turn it into an executable

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
Add support to debian package generation

Add debian package rules and Makefile that allows
people to build debian packages from it.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
Merge pull request #11 from lmr/debian-pkg

Debian pkg