Added a debug card command.

Documented some of the debug commands in the help.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@1475 c06c8d41-db1a-0410-9941-cceddc491573

Created by  haranp  on May 15, 2007
KFZYPFHHOWRUZEK2PW26EI73Z6I6DLHW2YEJV2CB5XBWFRRNBFXQC
Change contents