Revamped the entire AndyMotion API.

AndyMotion is now calling static. So no need of instances. Internal
AudioSerial is not using a separate thread since AndyMotion already uses
one.

Short tests show performance and reliability to be satisfactory

Also have implemented a way to identify zero speed and stop sending
audio data when speed is 0
api changes update
Merge branch 'master' of https://github.com/AndyRobo/andysdk.git
adding voice command. would be nice to see the ALICE framework here
Adding AndyNet for basic net stuff like discovery
initial upload