start implementing actual shito

(also looks like the test bench in libui_sdl/main.cpp snuck in with the copyright update. shit)

src/NDS.h

@@ -19,6 +19,7 @@
 #ifndef NDS_H
 #define NDS_H
 
+#include "Savestate.h"
 #include "types.h"
 
 namespace NDS
@@ -108,6 +109,8 @@ void DeInit();
 void Reset();
 void Stop();
 
+void Savestate(Savestate* file);
+
 bool LoadROM(const char* path, bool direct);
 void LoadBIOS();
 void SetupDirectBoot();