Continue to update state every 50 ms when no input is available at the console
Add AuxAudio functions to example program
 - auxaudio_enable: enables auxiliary audio and sets sample rate /
   encoding for audio
 - auxaudio_disable: disables auxiliary audio
 - auxaudio_register: registers a callback that prints the number of
   samples received
Fix wording of connect command message and remove colon from get_help command output