Experimentally use Denzi and/or Mitsuhiro's water tiles for the Shoals.

It's possible that they make the water look too busy, but maybe I only need to get used to it. Also add some more alternative tiles for the plain dungeon floor and walls, and move around some spell tiles again.

Also fix 2844278: melding stacks stat bonuses for Merfolk. Update change log for the starting stat and exclusion changes.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@10688 c06c8d41-db1a-0410-9941-cceddc491573

Created by  j-p-e-g  on September 16, 2009
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