Major rework of RPM spec file, this fixes #737.

Package building on OBS now works for:
 - CentOS 6
 - RHEL 6
 - Fedora 18, 19, 20
 - openSUSE 12.3, 13.1, Factory

We can now supply repo's for these distributions to our users.
Major rework of RPM spec file, this fixes #737.

Package building on OBS now works for:
 - CentOS 6
 - RHEL 6
 - Fedora 18, 19, 20
 - openSUSE 12.3, 13.1, Factory

We can now supply repo's for these distributions to our users.
Merge pull request #760 from jmaas/master

Major rework of cobbler.spec