Partially ES5506 support (not working yet!)

Add sample related enums
Add support for backward/pingpong loop, loop end position
Structize Notemap in sample instrument

src/engine/dispatchContainer.cpp

@@ -53,6 +53,7 @@
 #include "platform/vrc6.h"
 #include "platform/fds.h"
 #include "platform/mmc5.h"
+#include "platform/es5506.h"
 #include "platform/dummy.h"
 #include "../ta-log.h"
 #include "song.h"
@@ -311,6 +312,9 @@ void DivDispatchContainer::init(DivSystem sys, DivEngine* eng, int chanCount, do
     case DIV_SYSTEM_MMC5:
       dispatch=new DivPlatformMMC5;
       break;
+    case DIV_SYSTEM_ES5506:
+      dispatch=new DivPlatformES5506;
+      break;
     default:
       logW("this system is not supported yet! using dummy platform.");
       dispatch=new DivPlatformDummy;