Dev now includes controls for sounding the horn and flashing the lights and inside/outside temperature sensors

[PedroKTFC]

It occurred to me that controlling the climate might be dependent on inside/outside temperature so I've added sensors for this as it was relatively straightforward.
Also, there was a request for sounding the horn and flashing the lights so these are now available as button controls.

[PedroKTFC]

Now in main release.