Todo:
  ability to force begin/end point by sectors without track check
  more integrated logging/info file
  GtkGalette integration
  incorporate exception drives
  look at MSF TOC reconciliation, sub-q scanning
  Error bits, interpolation
  speed counter on status line
  Speed setting and management (some like fast, some like slow, back
	off when problems occur)

  expand "Could not read data from drive" error message.
  expand *all* error messages: give both the actual error and an explanation