Allow maps to place water/lava creatures explicitly. The dungeon builder will

automatically convert floor to water/lava as appropriate to place these monsters.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@1025 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on March 12, 2007
KRN7O2VJTLPT5KLUEMNGNYDSVHB3LYWONSREU2GOUXRMM3J6REYQC
Change contents