changed "passthrough_enabled" to "configured"
removed unreachable code in engineaux
reset vuMeter when EnginAux is not active
remove peak value when vu control is 0.0 because desabled
changed [Microphone] "enabled" to "configured" to match with EngineAux
Dont process Mic input buffer when talkover disabled
Merge pull request #177 from daschuer/engineaux

Engineaux and Microphone improvements