m_Do_Reset: OK (#35)

* m_Do_Reset: split and (some) decomp

decompiles:
- my_OSCancelAlarmAll()
- destroyVideo()

* mDoRst::reset(): decompile, plus some supporting code

* split DVD* functions to dvd.h

* mDoRst::resetCallBack(): decompile

include/JSystem/JKernel/JKRDvdFile/JKRDvdFile.h

@@ -3,6 +3,7 @@
 
 #include "dolphin/types.h"
 #include "JSystem/JKernel/JKRFile/JKRFile.h"
+#include "dvd/dvd.h"
 #include "global.h"
 
 class DVDFileInfo;