SCM cleanup
    
    Removing the Fedora-centric functions; we won't need those here.
    Also dropping the GIT+SSH scheme; rida won't have SSH access to
    pretty much anywhere. Also removing the is_scm_url() method; we
    already perform similar check in __init__.
    
    Removing the koji copyright notice; all of the code is our own now.
    
    I've also changed to documentation so that apidoc can parse it.
    
    Signed-off-by: Petr Šabata <contyk@redhat.com>