0.2
  -- added more SCSI error strings for host status and driver status
  bytes.
  -- added symbols for the different flags used in thread synchro
  -- removed the automatic appending of all current drives to the worklist
  at startup
  -- some cleanup in drive_handling. more transparent fallthrough of
  returns during an error.
  -- fixed segfault when extended window is selected and no drive is in
  the worklist
  -- removed the atomic load check for a drive array update in the
  interface
  -- moved memory de-allocation to after the interace thread has ended
  -- expanded on the extended view for a single drive
  -- added bounds checking during frame limiting in the interface