Add fountains of blood (as suggested by Lemuel), and tidy up

the existing fountains: change their order and remove all those superfluous dry fountain types.

I couldn't find any place for random generation of fountains, so if that is possible it will have to be disabled for blood fountains outside the hells. I've added a shortcut (Y) for vault creation, though. :) Drinking from such a fountain has a 33% chance of leaving it dry. I think that's it… for now.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@3886 c06c8d41-db1a-0410-9941-cceddc491573

Created by  j-p-e-g  on March 26, 2008
TPZWAV3USKO7RX4IGHLZKVPRN36K33PJPSZYL6FZMX4XBHTYOQYAC
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