v0.0.8.3 Updated Mediaplayer and CustomInputSource plugin to allow a
configurable standby GPIO pin (<Sources default_pin="7"
standby_pin="16">). The Pin goes high when not in standby low when in
Standby. Also made some slight changes such as:
When a track is played whilst in standby, we now come out of standby. 
If an analog source is selected whilst a track is playing the track is
stopped
If in standby no input source pins are high