Add packager.py script for building snapshot pkgs
readme: Add instructions for using packager.py
validator: Use packager.py in build procedure
Rename jenkins.sh to jenkins-nightly.sh
validator: Add jenkins.sh script for non-nightlies

This script does everything the nightly build does, except for
publishing packages. It builds the packages, but does not attempt to
publish them.
validator: Clean up docs in jenkins scripts.
validator: Install python-debian with apt-get

Previously, the package was intended to be installed with pip... but
since, in the test environment, pip needs to be installed first, a
simpler solution is to just install python-debian directly with apt-get.
Merge pull request #3 from larsbutler/master

Completion of validator build scripts