- removed obsolte txamp functions (re DAC enable sequence)
- reorderd TX enable sequence
- consolidated time keeping (ticks/time vs sample count)
  - added RX_ and TX_ prefixes for samples counts
  - added new data type rx_sample_cnt_t
  - renamed function to calc rx lag for more clarity
  - deactivated downsampling (locked feature, almost all steps made)

changed interface of txgain (appended Level, added function to obtain number of tx gain levels, added number of gain levels to ACI response