Include C-packages in documentation

[alistairbntl]

It would be nice if the documentation for c-modules like superluWrappers could be included in the documentation API. It seems like it should be possible.

[nerisaurus]

Do you mean that the API link should also include the separate C/C++/Fortran setup too - preferably intermixed as seamlessly as possible? There's apparently Breathe and a couple other setups (mentioned in Breath's readme) which try to link Doxygen and Sphinx together - I don't know how well it works on a project with a lot of other Sphinx stuff to start with.