Numerous changes:
-Added FSK and BERT modes. User can broadcast data by using 't <data>'
-Scan data is now binary, as is FSK data.
-GUI changes. Eliminated unused controls
-Default mode is now Listen instead of Scan
-Removed redundant code
-Toggle grid depending on mode
-Added Quiet and Pause
-Added procs implementing the SLIP protocol
-Fixed loading preferences
-Fixed console Home key