Paper 1 Uberseg + Gauss PSF Run: upgraded analysis

This is the final version of the superbit-metacal weak lensing analysis pipeline used in the first pipeline validation and forecasting paper [arxiv link to follow].

The following changes from v1.0 are implemented:

• True PSF rendering option in medsmaker (not actually used in the paper analysis)
• analysis code contains try/catch loop over empty directories
• shear_profiles figure has extra panel with difference between measured and true gtan

The following choices are specific to the Paper I analysis.

• To enable simulated observations in the deprecated shape filter, set fluxes of shape stars to the same value as lum stars.
• Set the minimum T/Tpsf ratio to to 1.2 for calculation of source density.