Use %{url} in %{Source0} to avoid redundance
    
    Remove note about temporarily using GitHub archives.
    The latest Python packaging guidelines say that packages SHOULD NOT use
    an archive that omits test suites, licenses and/or documentation present
    in other source arhives:
    https://docs.fedoraproject.org/en-US/packaging-guidelines/Python/#_source_files_from_pypi.