Change the copied XML code functionality to JSON

original commit messages:
* adding tests
* json tests

Core/ElementJSON/src/ElementJSONHandle.h

@@ -1,32 +1,32 @@
 /////////////////////////////////////////////////////////////////
-// ElementXML Handle file.
+// ElementJSON Handle file.
 //
 // Author: Douglas Pearson, www.threepenny.net
 // Date  : August 2004
 //
 /////////////////////////////////////////////////////////////////
 
-#ifndef ELEMENT_XML_HANDLE_H
-#define ELEMENT_XML_HANDLE_H
+#ifndef ELEMENT_JSON_HANDLE_H
+#define ELEMENT_JSON_HANDLE_H
 
 #include "portability.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-/* Define an ElementXML_Handle as a pointer to this empty structure to give users */
-/* a typesafe way to pass ElementXML_Handle's in and out.  In fact it's a pointer */
+/* Define an ElementJSON_Handle as a pointer to this empty structure to give users */
+/* a typesafe way to pass ElementJSON_Handle's in and out.  In fact it's a pointer */
 /* to a class, but that's not the client's business--to the client this is an */
 /* arbitrary handle.  If this is ever a problem, it can be typedef'd to a long. */
-struct ElementXML_InterfaceStruct
+struct ElementJSON_InterfaceStruct
 {
     intptr_t n; /* So that we compiles under 'C' */
 };
-typedef ElementXML_InterfaceStruct* ElementXML_Handle ;
+typedef ElementJSON_InterfaceStruct* ElementJSON_Handle ;
 
 #ifdef __cplusplus
 } // extern C
 #endif
 
-#endif  // ELEMENT_XML_HANDLE_H
+#endif  // ELEMENT_JSON_HANDLE_H