Switch recipes to use fauxSim

[djbard]

Currently the recipes call phosim via subprocess, which is ugly. They should call fauxSim instead, which is much more elegant.

[jchiang87]

Hi Debbie,

BTW, I found the reason the bdgals-fixed.dat input catalog wasn't working with faux_sim.py: I'm using the parameter names in the default_instcat file, which has the names "Unrefracted_RA_deg" and "Unrefracted_Dec_deg", whereas the entries in the bdgals-fixed.dat file are missing the "_deg" suffix. That file works with the standard phosim.py because that script just matches for the substrings when going through the lines from the input catalog.

Feel free to file any issues on faux_sim.py if you have feature requests. I'm planning to add checks on the input parameters against the default_instcat entries to be sure all expected entries are present.