File _service of Package spnavcfg

<services>
  <service name="download_url">
    <param name="host">github.com</param>
    <param name="protocol">https</param>
    <param name="path">/FreeSpacenav/spnavcfg/archive/spnavcfg-0.3.tar.gz</param>
  </service>
</services>