* Implementation of Spektrum Telemetry for the DYI Multimodule.
I can only test a subset of sensors and these look okay
* Implement conversion from Fahrenheit to Celsius
* Minor fixes for Spektrum telemetry
* Add some more sensors, show sensor ID instead of instance in the overview
* [Horus] PXX and DSM2 in external module
* [Taranis] Pulses driver refactoring (uses DMA also for PPM in external module and saves 800bytes RAM)
* Cosmetics (Pulses driver splitted)
The Fifo is created with ```telemetryRegister``` and elements (ID + Value) are taken from the Fifo with ```telemetryPop```
Not tested at all. Just for review / discussion
Bertrand Songis