Merge pull request #51 from ipa-cob4-1/master

cob4 manual
Merge pull request #52 from ipa-cob4-1/master

setup for cob4: addusers, udev rules, user.bash
Merge pull request #53 from ipa-cob4-1/master

removed the cob4 setup stuff, created new setup_cob4 repository
Merge branch 'master' of https://github.com/ipa-nhg/setup