modified sean's code (original file: makeLengthComps.r), so that rather than outputting a single file, instead output scal_lengths.dat - i.e., all the fishery-sex combinations ina single dat file. for commercial fisheries (fishery=1), sums up the total catch at each length class, (obtained by proportion at length class x total), and year, then divides this by the total catch for each year (renormalize). for non-commercial fisheries (surveys, fishery=2,3), just outputs the proportion data in lengthComps_m.txt etc)