I was looking through my old edits which never got committed and one really minor change was that i moved

#include <iml/cg.h>
#include <iml/gmres.h>

cg.h and gmres.h is a bit ambiguous so it makes sense to put them in a subfolder. If iml++ ever was packaged for some distro, it would surely put it's filed under iml (or iml++/imlpp) where there would be no need to specify a path manually if it was installed through the package manager.

I'm reluctant to make this small change since it might break the automatic build system, so i'm holding it back for now.