Renamed files from enginepassthrough -> engineaux
Renamed Class EnginePassthrough to EngineAux (Thank you Eclipse;-))
Fixed some remaining renames in comments and strings
renamed group from "[PassthroughN]" to "[AuxN]"
Rename Passthroug to AUX in sound preferences
fixed typo
Renamed the AUX to the Auxilliary in user visible strings for all English speakers. A suitable German translation would be AUX-Eingang.
changed Aux to Auxilliary
Merge pull request #176 from daschuer/engineaux

Engineaux