Added you.good_god() and you.evil_god() to check if the player is worshipping a good/evil god. Passing a god name is optional, and will check if that god is good/evil (you.good_god("Elyvilon") == true).

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@2715 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on November 1, 2007
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