modified red_cal_v003.py

Added comments and some print statements.
imported time module.
Added sub array of 128 input data.
    [49    41    47    19]
    [10     3    25    48]
    [ 9    58     1     4]

Changed pols from ['xx','yy'] to only ['xx'].
Added zsa module

to capo/src.
Modified __init__.py to import zsa