Update to 0.8.2
    
        - Update to upstream release 0.8.2
        - Enable GSettings.  Remove usage of GConf.  Bump glibmm24 requirement
          to 2.25 (to support gsettings) Add build requirements for
          gsettings-desktop-schemas-devel, dconf and glib2-devel >= 2.28.
          Remove GConf schema from package.  Add gsettings schema.
        - Remove use of scrollkeeper at long last.
        - Cleanup and update scriplet snippets.
        - Bump gtkmm24 build requirement to 2.20 as per what upstream
          requires.