[fitswcs] Grisms

[Eric Greisen]

I have added a short paragraph as you suggested.  New version

http://www.aoc.nrao.edu/~egreisen/scs_050422.ps.gz
http://www.aoc.nrao.edu/~egreisen/scs_050422.ps
http://www.aoc.nrao.edu/~egreisen/scs_050422.pdf

They are pointed to by generic names scs.ps.gz, scs.ps, and scs.pdf as
well although your browser may think it knows what those mean (and
give you an old copy).

Thanks for noticing this.

Eric Greisen