Proper database commit/close sequence, to handle non-RAM/pickle databases (i.e. make HDF5 work properly)
Model setup parameters (data and psf images, zeropoint, mask) are now specified by a Configuration component in the model file instead of arguments passed to model_galaxy_mcmc.
Fixed error in posterior composite inverse variance map calculation.
Added timing test for point source lanczos3 shifting.
Merge remote branch 'origin/feat/configuration-component' into feat/configuration-component