- the UART communication is improved based on UART Idle line detection interrupt
- an Rx ring buffer is used to manage the UART incoming data
- both Tx and Rx are efficiently handled using DMA
#45#64#65
Other:
- minor visual improvements
- fixed all warnings for VARIANT_NUNCHUCK and VARIANT_PPM
- changed the variant order: the basic Variants on top, more application specific in the bottom