preferred-applications

       Selecting preferred applications is more difficult than it
       should be. One should be able to say you prefer Abiword and
       have all filetypes automatically changed. If I prefer F-Spot to
       G-Thumb, all filetypes *and* the camera importer should be
       changed.

       List of possible applications should include those in the
       archive, selecting one installs it and marks it preferred.
       * Any relevant existing fd.o specs?
       * Discuss with upstream people at FOSSCamp
       * Should we submit this as an fd.o spec? If so plan to write it

       * Merged Preferred Applications and Removable Media prefs
       * Should be accessible from file right-click

       * Preferred application launchers; use them by default/
       * Manage alternatives too?