More read/write tests for town and outdoors, including maps/dialogue

Fixes:
- For towns, the "has tavern" flag was not saved or loaded
- Outdoor roads were not saved or loaded
- For outdoor encounters, the "can't flee" and "forced" flags were not loaded, and "forced" was not saved
--> These two flags have also been separated in the code

src/classes/town.hpp

@@ -38,7 +38,7 @@ protected:
 public:
 	class cWandering { // formerly wandering_type
 	public:
-		mon_num_t monst[4];
+		std::array<mon_num_t,4> monst;
 		
 		bool isNull();
 		void append(legacy::wandering_type old);