Forward-port 0.5 r10272 to trunk (except that Dissolution actually gets

the Slime God as its god), and add a few minor cleanups.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@10273 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on July 18, 2009
KIAIGHATPEOUGEWQXS2IR4635E53WPEENC5UJ3I3MASTJ7SHBU5AC
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