 Revisions for SetBlaster.

v1.0:
 Initial release

v1.1:
 Changed the way that it updates AUTOEXEC.BAT - rather than putting the SET
BLASTER line at the end, it puts it at the beginning, and REMs out any other
SET BLASTER lines it sees.

 Altered IRQ check code to eliminate some false-correct readings.

 Added ending ANSI screen.

 Added /DSP to display DSP revision number.
