Fix image links in the primer.
Add support for generating PostScript of handouts/slides.
Merge branch 'master' of github.com:rebelsky/psaifr

Pulled images and stuff from upstream.
Merge branch 'master' of github.com:rebelsky/psaifr

Okay, really pulled all of the images.
Merge branch 'master' of github.com:rebelsky/psaifr
Merge branch 'master' of github.com:rebelsky/psaifr
Merge branch 'master' of github.com:rebelsky/psaifr
Merge branch 'master' of github.com:rebelsky/psaifr
Add html2ps stylesheet for slides.
Update Makefile to use the new html2ps stylesheet.
Improve output from talk2{handout,slides}.
Some updates to the talk.
Updates to .html files as consequents of updates to source files.
Merge branch 'master' of github.com:rebelsky/psaifr
Minor update to talk2handout to try to get appropriate box height.