- Added code to check for waterfalls in all 8 cardinal directions
- Fixed bug in which swamp caused a false negative for the wall-rounding code - Made directions into an enum, with an operator++ and two difference arrays (for x and y). - Added case to wall-rounding code to handle a lone pillar of wall - The block_horse flag is cleared when importing a poison or disease terrain, because horses can now not cross status-inflicting terrain at all. - Added the book Finder icon git-svn-id: http://openexile.googlecode.com/svn/trunk@64 4ebdad44-0ea0-11de-aab3-ff745001d230
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