Log Message:
Update to 0.9.13. Changes:
- Only perform additional database request when using Sensor localtime:
  this bring a performance improvement of about 36% on aggregated query,
  when using either frontend localtime (the default), or UTC time.
- JQuery support: Port most of the javascript code to make use of JQuery.
  Add show/hide effect to CSS popup. More filtering functionality in the
  SensorListing view.
- Cleanup the Authentication class, so that uper Prewikka layer can act
  depending whether the backend support user creation / deletion. Anonymous
  authentication is nowa plugin.
- Better integration of CGI authentication allowing user listing and deletion.
- Report template exception directly to the user.
- Fix exception if an alert analyzer name is empty.
- Fix problem when adding new Prewikka users (#262).
- Fix exception when user has no permission set.
- When changing password, we didn't try to match an empty 'current password'
  (which is a minor issue since the user is already authenticated). Thanks
  to Helmut Azbest <helmut.azbest@gmail.com> for the fix.
- Fix a typo making mod_python use the parent method (patch from
  Helmut Azbest <helmut.azbest@gmail.com>).
- In the configuration file, recognize section even if there are whitespace
  at the beginning of the line.
- Localization fixes, by Sebastien Tricaud <toady@gscore.org>, and
  Bjoern Weiland.