Separate NAZARA_API into multiple defines (one per module)

To fix inter-module dependency


Former-commit-id: 64704f020e0af22e529d38527323ba977187d4d0

include/Nazara/Core/GuillotineBinPack.hpp

@@ -15,7 +15,7 @@
 #include <Nazara/Math/Rect.hpp>
 #include <vector>
 
-class NAZARA_API NzGuillotineBinPack
+class NAZARA_CORE_API NzGuillotineBinPack
 {
 	public:
 		enum FreeRectChoiceHeuristic : int;