Load the NPC and warp JSON files according to the config file.

NPC data was being read from the config, but ignored.

src/settings.hpp

@@ -12,6 +12,7 @@ namespace settings {
     extern int SPAWN_Z;
     extern std::string MOTDSTRING;
     extern std::string NPCJSON;
+    extern std::string WARPJSON;
     extern std::string GMPASS;
 
     void init();