Add basic support for CI test execution Add basic support for executing continuous integration (CI) tests on RHEL6, RHEL7, Fedora 20, Fedora Rawhide and Debian Testing. This adds two front-end scripts which can be executed either locally by developers, or on a CI server: contrib/ci/run and contrib/ci/clean. The first one will run the tests and the second will wipe out the artifacts. See contrib/ci/README.md for further details. Reviewed-by: Michal Židek <mzidek@redhat.com> Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>