RF: BufferImageStim clearBuffer after capture
NF: microphone - wav2flac and flac2wav to compress/uncompress sound
RF: microphone component: expose stereo, AdvAudioCapture
RF: microphone component changed to only use AdvAudioCapture

- simpler user interface
- same functionality as AudioCapture, plus more bells & whistles
Merge pull request #339 from jeremygray/master

RF: BufferImageStim tweak; sound file compression