Update to work for Ubuntu Precise (#2)

With this patch I can generate a deb. It seems some of us have different /usr/share/python/debpython to you. This seems to be part of the python3 and python-minimal packages. Indeed, it looks like a python2 vs python3 issue.
Support python2 and python3
Merge remote-tracking branch 'Jc2k/patch-1'

This fixes an issue with relative links being included
in packages

Conflicts:
	bin/dh_virtualenv
Import a change to fix relative links