Added show_turns option to control turn counter display.

Also documented morgue_dir (thanks, David).

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@750 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on December 31, 2006
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