(World) Inlined some methods

Former-commit-id: eab086bdde8b11cc261faf2cb5d161bbfcebdc73

SDK/include/NDK/World.hpp

@@ -20,7 +20,7 @@ namespace Ndk
 			using EntityList = std::vector<Entity>;
 
 			World();
-			~World();
+			~World() = default;
 
 			Entity CreateEntity();
 			EntityList CreateEntities(unsigned int count);
@@ -46,4 +46,6 @@ namespace Ndk
 	};
 }
 
+#include <NDK/World.inl>
+
 #endif // NDK_WORLD_HPP