Changed error message + exit() sequences to end() calls so that the user can

see the error message on the console.

Added docs/ to the data search path for the Windows builds.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@829 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on January 11, 2007
SH6NU4H5TG4O7CRXRHZ7MDHABZLWWXQ77NJDBHI7KCVHXHQYK46QC
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