This is part of a general effort to shift usepackage statements out of
individual .ltx documents and into our common .sty infrastructure.
There are probably other packages that could be shifted too; rather
than do a sweep to find them, I'm just doing it opportunistically.

Move the LaTeX template files and the get_revision script from OTS's
private SVN tree to here.  Rewrite README.md.  Clean up the Makefile,
moving all documentation into README.md removing the "VIEW=true"
feature as discussed with James.

Use spaces instead of TABs for the left-side whitespace on line inside
the shell expression.  Break the first line into two lines, and on all
lines move the continuation backslashes leftward to stay within 80 cols.