switch the code to skelcd-control-openSUSE package

the package will be maintained in this Git repository,
(instead of OBS), all changes should happen here and the usual
Yast tooling should be used (Jenkins CI, rake tasks...)
changed versioning to a fixed number

removed get_version_number.sh magic script and related Rakefile hacks/workarounds
Merge pull request #5 from yast/change_to_skelcd

Switch the code to skelcd-control-openSUSE package
fixed build
fixed *-promo build failure
generate *-promo files in the "tarball" rake task
Merge pull request #6 from yast/build_fixes

Build fixes
add clone proposal
changes
Merge pull request #7 from yast/clone_proposal

Clone proposal
do not have cloning proposal and instead use it automatic
changes
Merge pull request #8 from yast/remove_inst_image_proposal

do not have cloning proposal and instead use it automatic