- Update to version 0.0.0+git.20201202:
* test_xtrxll: Only set TCXO DAC value when it's changed in the
GPSDO algo.
* Document XTRXLL_ONEPPS_CAPTURED sensor enum value.
* Fix log output laguage.
* test_xtrxll: Debug output and usage text improvements.
* test_xtrxll: Cleanup the GPSDO test code.
* test_xtrxll: Correctly handle coefficients history in GPSDO code.
* test_xtrxll: Support -h command line argument
* general fixes for rev5
* add extrenal SPI interface over FPC GPIO
* add ability to work with any packet size using short packets