Improving standard compiler compatibility (#2926)

* Adding explicit dolphin/ prefix & fix characters

* Rename ShiftJIS to SJIS

* Separate JASSeqReader read methods implementation between compilers.

* Fix pointer.h

* fix d_item_data typo

* fix gcn matching issue

include/JSystem/JMessage/JMessage.h

@@ -1,7 +1,7 @@
 #ifndef JMESSAGE_H
 #define JMESSAGE_H
 
-#include <dolphin.h>
+#include <dolphin/dolphin.h>
 
 // Struct definitions might be wrong
 typedef struct bmg_header_t {

include/JSystem/JMessage/locale.h

@@ -1,7 +1,7 @@
 #ifndef JMESSAGE_LOCALE_H
 #define JMESSAGE_LOCALE_H
 
-#include <dolphin.h>
+#include <dolphin/dolphin.h>
 
 namespace JMessage {