Added Dave Schaap's heyu patches for rfxtrx module

- patch-heyu-2.10a.gz  Initial patch introducing RFXTRX

- patch-heyu-2.10b.gz  Added Wind support
- patch-heyu-2.10c.gz  Added Rain sensor support
                       Display of RX level (DISPLAY_RF_RXLVL YES)
- patch-heyu-2.10d.gz  ALPHA: Added UV sensor support