Updating documentation. (David)

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@2116 c06c8d41-db1a-0410-9941-cceddc491573

Created by  j-p-e-g  on September 16, 2007
XKDALQELMP42L6W6R5H4BYOCE4SJOT56G4FO7IMESHDCL5AHQBMAC
Change contents