- Handling for Hill fort and (kinda) Magic Well

- Improved hero exchange
- Fixed strange case when AI found allied town extremely dangerous, resulting in endless loop

lib/GameConstants.h

@@ -210,12 +210,14 @@ namespace Obj
 		DERELICT_SHIP = 24,
 		DRAGON_UTOPIA = 25,
 		GARRISON = 33,
+		HILL_FORT = 35,
 		LIBRARY_OF_ENLIGHTENMENT = 41,
 		MONOLITH1 = 43,
 		MONOLITH2 = 44,
 		MONOLITH3 = 45,
 		MAGIC_PLAINS1 = 46,
 		SCHOOL_OF_MAGIC = 47,
+		MAGIC_WELL = 49,
 		MINE = 53,
 		MONSTER = 54,
 		OBELISK = 57,