Move gamecart files to their own folder

Preparation for splitting them up into multiple files

Makefile

@@ -18,7 +18,7 @@ include $(DEVKITARM)/3ds_rules
 #---------------------------------------------------------------------------------
 export TARGET		:=	$(shell basename $(CURDIR))
 BUILD		:=	build
-SOURCES		:=	source source/fatfs
+SOURCES		:=	source source/fatfs source/gamecart
 DATA		:=	data
 INCLUDES	:=	source
 

source/main.c

@@ -6,7 +6,7 @@
 #include "framebuffer.h"
 #include "hid.h"
 #include "fatfs/ff.h"
-#include "gamecart.h"
+#include "gamecart/gamecart.h"
 
 extern s32 CartID;
 extern s32 CartID2;