I just realised: the new Sum and Convolution classes have hyperlinks to URLs in the `GalSim_Quick_Reference.pdf` document, and these still point to the doxygen `Add` and `Convolve` pages which will now document the functions rather than the classes.  This ought to be updated to point to the new locations (linked from here: http://galsim-developers.github.io/GalSim/namespacegalsim_1_1compound.html) when this is merged into master (it might also require @joezuntz running a little script he mentioned in #496 ).

This is not actually your fault Josh.  In fact, I noticed that the Quick Reference links for `Add` and `Convolve` have been out of date ever since we moved beyond v0.4.1 and they moved to the `compound.py` module.  But if they could be updated here right after merging (it's fine to be done on master I think) for the new classes then that would solve the problem anyhow.