Added fluxes.
Tweaked.
Corrected bug in peakData() so that it now takes negative Q/U values into account.
This function now makes the ./plots directory and deletes the old commands.csh file, since it's the first one run during a reduction.
Pol log now includes obs_date, calflux, and band.
Tweaked calculation of peak_pol
Changed nxy for the bandpass plots, and corrected a bug in the uvcat syntax.
Default is now to overwrite the leakages.
Default is now to apply the flux to pr.def and FluxSource.cat.  This also now writes out a bootflux.log that is turned into a PS file in the ./plots directory.
Tweaked snr_Q and _U so that they're always positive.