Update to upstream version 0.11.0 to fix open Debian bugs

I upgraded the package to upstream version 0.11.0 (1.0 is not ready yet) and tested it with the django package in unstable. I bumped the Standards-Version and added myself as Uploader to the debian/control file.

Please pull these changes and create an upload. I would also volunteer to (Co-)maintain this package if you like.

Best regards
Jan Dittberner