LaTeX landscape

Rendering LaTeX in landscape means mucking with dvips and ps2pdf on most systems. These four lines work under OSX.

   `which latex` foo.tex
   `which dvips` -Ppdf -t landscape foo.dvi
   `which ps2pdf` foo.ps
   open foo.pdf

Make sure the LaTeX source starts with something like \documentclass[landscape,letterpaper]{article} and make sure the which subshells return real applications.