Skeleton for ABST box, all functionality removed for now.

MP4/box_abst.cpp

@@ -0,0 +1,13 @@
+#include "box_abst.h"
+
+Box_abst::Box_abst( ) {
+  Container = new Box( 0x61627374 );
+}
+
+Box_abst::~Box_abst() {
+  delete Container;
+}
+
+Box * Box_abst::GetBox() {
+  return Container;
+}

MP4/box_abst.h

@@ -0,0 +1,10 @@
+#include "box.h"
+
+class Box_abst {
+  public:
+    Box_abst( );
+    ~Box_abst();
+    Box * GetBox();
+  private:
+    Box * Container;
+};//Box_ftyp Class