Torrent: If dateDone==null but partDone==1, set it to 1900-12-31
so they appear at the bottom of the list when sorting by date done
descending
Hide search and RSS settings if not supported (i.e. in Lite version).
Allow filter action to show in main action bar (and add an icon for the action).
Merge pull request #11 from tombriden/datedone_sortfix

Fix for datedone sorting if there is no date done for a torrent.