Fix some comment typos
Add option to use Kolmogorov psf by setting psf-beta <= 0 and make this the default
Fix units typo in verbose output
Add --no-disk option similar to existing --no-bulge option, and only simulate flux associated with the remaining component.
Add --render-nopsf option and change default behavior to not render nopsf stamps (but keep an empty stamp in its place so the output format does not change).
Combine the disk and bulge at the stamp level instead of at the source level
Fix comment typo
Replace margin (arcmins) with max-size/2 (arcsecs) and add no-margin flag to disable margins
getPsfBoundsEstimator returns a function that estimates psf bounding box in pixels (not used yet)
Use new psf bounding box estimator
Circularize the psf profile used to estimate the psf bounding box
Truncate bounding box to max_size