debian: Update build-depends to be able to use pbuilder

* Added debhelper and lsb-release to Build-Depends
* Bump Standards-Version to 3.9.3
* Added Vcs-Browser field
* Added readme to calamari-server docs
* Switch to architecture any (depends to python-dev)
* Added debhelper misc:Depends and python:Depends
Merge pull request #189 from sbadia/fix-debian-build-deps

debian: Update build-depends to be able to use pbuilder