new: implementation for 'raw' packages - with no source to clone etc
(addons written in python, xbian-config-shell in bash/dialog and others)
fix: install systemd-shim instead of -sysv to avoid conflict with upstart
changed patch's fuzz factor value to 10
fixes reported here: https://github.com/xbianonpi/xbian/issues/561
new: add python-tz by default due to external xbmc addons dependencies