Numerous changes to terrain and trim. The changes to the scneario editor work as expected.

- New way of drawing walkway (doesn't work yet)
- New way of drawing roads (doesn't yet work correctly)
- New way of drawing trim (not tested yet)
- New way of handling marked specials (works in editor but not in game)
- New way of handling two-space rubble in the editor (works as expected)
- Merged several terrain special properties
- Deprecated several terrain graphics
- Completed (probably) the import & convert code for old-format terrain
- Probably other things that I have forgotten that have something to do with terrain
- A few other little things, bugfixes, etc

git-svn-id: http://openexile.googlecode.com/svn/trunk@56 4ebdad44-0ea0-11de-aab3-ff745001d230

osx/classes/outdoors.h

@@ -54,6 +54,7 @@ public:
 	char spec_strs[90][256];
 	char sign_strs[8][256];
 	char(& out_strs(short i))[256];
+	bool special_spot[48][48];
 	
 	cOutdoors();
 	cOutdoors& operator = (legacy::outdoor_record_type& old);