remove startup scripts for the 2nd stage
control.openSUSE.xml - removed 2nd stage

additionaly
- removed repair
- moved release notes and congratulate to the 1st stage
remove YaST2-Second-Stage.service
YaST is now in Git
update version to 3.1.0 (for the next distribution release)
Merge pull request #68 from yast/2nd_stage_cleanup

2nd stage cleanup