Crawl loads init.txt from data file path if it can't find any other .crawlrc.
makefile changes to copy settings directory to install dir. Tested only on Linux/tty.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5258 c06c8d41-db1a-0410-9941-cceddc491573
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