add sample recording and playback capabilities#5

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utz82 wants to merge 2 commits intomasterfrom

Commits on May 16, 2017

add sample recording and playback capabilities
utz82
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Commits on May 29, 2017

add safeguards against using motor functions while playing PWM samples, fix check for motorA activity in motorBOn(), adjust mic sampling thresholds and provide a sensitivity parameter for recording…
utz82
committed