-Completed first test bench + Python test case for correlator.vhd:

 . Only the permutator and the multiplier stages are used
 . Block gens generate subband data from HEX files
   . Single amplitude
   . Phase offset 1 degree per incremental input
   . 1024 identical subbands per stream
 . Correlator multiplies using conjugate so we can extract the phase diffs
 . Data buffers are read out by tc_correlator.py 
   . Phase info is extracted and plotted
 . Current nof_inputs = 24.