Next part of town configuration:

- town screen is mostly implemented, has some minor issues
- factions are now separate from towns, neutrals have faction with id=9
- more constants to GameConstants: town-specific buildings, strings for terrains and resources
- replaced most access to builtBuildings with isBuilt() method
- replaced id's with enums for town subtype and buildings id's

lib/JsonNode.cpp

@@ -501,7 +501,7 @@ bool JsonParser::extractString(std::string &str)
 			str.append( &input[first], pos-first);
 			return error("Closing quote not found!", true);
 		}
-		if (input[pos] < ' ') // control character
+		if ((unsigned char)(input[pos]) < ' ') // control character
 		{
 			str.append( &input[first], pos-first);
 			first = pos+1;