fixes conflict artifact from 41271fd
[tests] do not fail in core.contract if mock is not installed
[deb] initial dh-make output
[deb] adds build deps + dir installs
[deb] fixup control file syntax errors
[setup] disable distuatils_setup usage

downloading of newer distutils scripts interferes with debian
packaging and seems no longer necessary
[debian] update deps
[debian] deletes example files
[debian] overrides clean target, switches to native format
[debian] fix dependencies/install location
[debian] prelim. demos package
[debian] new -doc and arch dep. packagages