Major ice cave tweaking mainly based on player comments & feedback from ##crawl

  • the ice statue onslaught at the beginning of the small caves was contrary to the design goals, toned it down for most maps
  • no placing freezing fog on top of the entrance
  • make the ice cave zone D:14-20 instead of D:14-24
  • don't give the necromancer a redundant wand of cold
  • try to place clouds so they don't kill off monsters
  • fix a missing milestone
  • fix a missing frost giant/ice fiend

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@10513 c06c8d41-db1a-0410-9941-cceddc491573

Created by  evktalo  on August 11, 2009
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