After some thinking remove the bat form exception for starving Vampires

not regenerating. Also add some more information to the Vampire mutation toggle.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5651 c06c8d41-db1a-0410-9941-cceddc491573

Created by  j-p-e-g  on June 9, 2008
BPZF2HJ53ACONE2EUFZO7QT3OLOOCCIHOBS47CGAHZA3XRC47MIQC
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