Added Python bytecode to .gitignore.
[scripts/setupsma] Added a 16 sec wait_period to MMCM calibration.

This is to be consistent with the bug fix in the ADC testing repo,
sma-wideband/adc_tests@ecd1562
[scripts/xeng_order] Changed the mapping of antennas in xeng_order.

This currently matches the direct-connect setup at the SMA.
[scripts/xeng_order] Moved the default behavior into a __main__ block.
[scripts/catchdata] Updated the data catcher to process all direct-connect data.

The two direct-connect visibility IP addresses are currently hard-coded to the
values used at the SMA but these should work on the bench system too. The code now
properly waits for data from both ROACH2s (single sidband) for a single accumulation
before putting it on the queue.

Follow up commit will update the other end of the queue.
[scripts/catchdata] Updated data catcher to process full 16k direct-connect data.

This is of course for only 6-baselines and a single sideband. Also updated the
data catcher to send out the correlation-matrix ordered data to the SMA dataCatcher
and corrSaver using Taco's sendIntegration function (wrapped in Python). This
should send the auto-correlations first, followed by the cross-correlations.
[scripts] Changed the default HB sync source from ADC0 to ADC1.

This is temporary and will eventually be changed back. Had to do this
because one of the direct-connect ROACH2s appears to have a broken cable
or contact leading from the front panel to ADC0 (normally reserved for
the HB). Paul had to swap HB and 1pps inputs which requires this commit's
changes to work.
[scripts/setupsma] Changed default integration time to 8 half-Walsh cycles.

This corresponds to 16 actual Walsh cycles (since we're currently running
at half-speed) which is about 10 seconds.
[scripts/stats] Added a new script for checking ADC statistics at SMA.

$ python ./scripts/stats.py --help
Plot a histogram of the 8-bit sampled correlator data for the given antennas

positional arguments:
  ANTS                  show histogram for ANTS

optional arguments:
  -h, --help            show this help message and exit
  -s SOURCE, --source SOURCE
                        set source to SOURCE (default analog)
  -b BINS, --bins BINS  split the data up into BINS
  --norm                normalize the bins
  --save                save histograms to file,
                        <datetime>.<norm|cnts><antenna>.<source>.hist
  --no-plot             don't show plots, usually used with --save