How to install httplib2?
httplib2 is available in the official Kodi repository which is included by default in Kodi. You can install this addon by going in Kodi to System >> Settings >> Addons >> Get Addons >> XBMC.org Addons or Kodi.tv Addons
About SuperRepo and httplib2
SuperRepo does not maintain httplib2. We only provide an automated index for Kodi users to have easy access to httplib2 and other addons for Kodi. We are not affiliated with the developers (Joe Gregorio) and do not provide help for this particular addon.