run: install software-properties-common only

python-software-properties is not needed.
run: remove all -qq from apt-get calls

While I do prefer -qq, we're getting some errors that need
investigation.
run: add tcp:// to DOCKER_HOSt

Docker 1.2 fails miserably: it just panics.
run: properly set DOCKER_HOST

Sorry about the half fix :(
Adding experiment Debian support
Compatible with sysvinit (archive-server)
gandalf template
Fix tsuru.conf
Upgrade needed backports packages