[Gentoo] More updates. Ah, so exciting.

I spent some time today fixing science and cluster bugs. If it’s anything in either of those herds that I touch, it’s probably fixed: lam-mpi, pvm, pssh, clusterssh, mpqc, opendx, moldy, grace, gnuplot, pdflib … plus a couple of X things.

Grant, hope you don’t mind that I added a patch to gnuplot. Some guy filed a bug saying it didn’t compile against pdflib 6.0, which wasn’t even in the tree. That motivated me to go dig out the patch and to add the new version of pdflib. As a result of pdflib 6.0, I also had to bump grace to a version that worked with it.