Merge pull request #258 from jeremygray/master

 remove microphone.switchOff()
Merge pull request #259 from jeremygray/master

more minor RF sound in microphone
BF: sound demo should only init() with small buffer if using pyo
ENH: shrink win32 Standalone by removing doc files and *.pyo
ENH: added Window.callOnFlip() and a demo to show how to use it
DOCS: minor
DOC: typos in callOnFlip doc string