properly set the data rate
preliminary tx power setting, uncalibrated
TX_NCO_MODE definitions
support for CW modulation (module behave as a signal generator)

Reformat some code

reorganize debug comments
cleanup pending status at boot

implement get_chip_status and use it to detect command errors

add fifo read and write commands
add comments, add a function to set a single byte property
add bits for global config property and fast response register options