[2058822] Fix ice storm damage, make both storms and bolts of ice and magma less resistible (ice being less resistible than magma), give ice storm more damage than fire storm, make fire storm vortices aligned with the caster, but temporary.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@6845 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on August 22, 2008
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