Maintain internal definition of Creative Works
    
    @till rightly pointed out that the Creative Commons page I linked does
    not define what a Creative Work is. So, we cannot tell people to look
    somewhere for a definition where it is not defined.
    
    This edit creates a broad definition of what a Creative Work might be
    while also reserving the right of the Fedora Council to change the
    definition of a Creative Work in the future.
    
    https://pagure.io/Fedora-Council/council-docs/pull-request/67#comment-118151
    
    Signed-off-by: Justin W. Flory <git@jwf.io>