Please add LISP mention on interfaces page

Vince, please add a mention of the Emacs LISP interface at:

http://www.chez.com/emarsden/downloads/pg.el

I have attached the SGML which contains more information. I am removing
this file from the SGML docs because we don't ship or support this
package.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026