Implementation of see-also idea by Fredrik Lundh for the old LaTeX docs.

See http://effbot.org/zone/idea-seealso.htm for the XML description.

parse-seealso.py : retrieves a URL, parses contents, adds them to a 
		   pickled dictionary

Example usage: 
	parse-seealso.py seealso.xml /tmp/db

		   
Error trapping is minimal; usually it'll die with an exception 
if something goes wrong.

TO DO:

* Convert to work with the Sphinx-formatted docs.

* Possibly switch to using Atom and feedparser.py instead of a custom format?
  Or scrape a wiki page?

--amk