SC/2: Works with PDFLATEX

- Use includegraphics instead of epsfig
- Rename .ps to .eps
- Fix bounding box of sc2_jcmtsurface.eps

I have also generated the PDF files from the EPS and committed them.
The reason for this is that I had trouble with some of them in
epstopdf as they triggered ghostscript errors. It seemed safer to
explicitly add the converted files.