Added target_unshifted_dirs option to activate old (0.1.x) targeting keymap.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@1015 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on March 11, 2007
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