Implement a configuration build step.

It makes it possible to specify files on setup() that should have @@value@@
variables substituted ob build. The files will be copied to build/<path>
when doing that and have to be installed from there. Dependencies are checked
against setup.py and the original file.

        configure_values = {
            'webroot': webroot,
        },
        configure_files = [
            "config/settings",
            "config/cobbler.conf"
        ],
Replace the webroot in configuration files.

This gets rid of one opensuse patch.
Add Directory directives for cobbler web content.

Another opensuse Patch. Not sure if its needed. Please complain if not.