Enable Slide advance on DigitDia 4000 and correct misspelling
These changes enable the "Advance slide" feature for the Perfecta DigitDia 4000, see issue #461 (closed) . Additionally I have changed a misspelling of the --advance - Option.
These changes enable the "Advance slide" feature for the Perfecta DigitDia 4000, see issue #461 (closed) . Additionally I have changed a misspelling of the --advance - Option.