[1619461] AotG now needs ~800 turns to charge fully, and the

contaminated->clean effect is proportional to charge.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@686 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on December 21, 2006
EHCZCD3WGKXB4KDQKZXE7FZQHJ6E4IHHCM7GZJBRMDEQSDC223YAC
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