Moved readme.txt to docs/quickstart.txt and updated it.

Removed README.stone_soup.txt and replaces it be readme.txt. Note that ?^ (in-game reading of the old readme.txt) will now show a completely different file. We may want to allow both reading of readme.txt and docs/quickstart.txt.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@3744 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dploog  on March 20, 2008
IBONFFRJOJEKWUXXYITSPMEINMJB5AJ5Z7HHYUAC4HG7CLTRRNJQC
Change contents