Add minor documentation updates.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@9601 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on April 17, 2009
ZQKLKCCTNRJCSFGKJJ7KRACSBU34E2BBW4LEJ5VLMEQZVKVXD6CAC
Change contents