control.rng has been moved to yast2-installation-control package

- use Yast RPM macros in the spec file
- 3.1.4
format the spec file by "prepare_spec" OBS tool
Merge pull request #21 from yast/spec_cleanup

Spec cleanup
added build dependency to systemd

needed because of %{_unitdir} RPM macro definition
Merge pull request #22 from yast/systemd_buildrequire

added build dependency to systemd
move cloning to first stage as new installer do not have second stage
version bump
Merge pull request #23 from yast/clone_first_stage

move cloning to first stage as new installer do not have second stage
Merge branch 'master' of github.com:yast/yast-autoinstallation into NI_modifications
version bump