supports cdata start/end for node-expat

expat_cdata

diff --git a/node-expat.cc b/node-expat.cc
index fbd6b0a..d39dcbe 100644
--- a/node-expat.cc
+++ b/node-expat.cc
@@ -10,6 +10,7 @@ using namespace v8;
 using namespace node;
 
 static Persistent<String> sym_startElement, sym_endElement,
+  sym_startCdataElement, sym_endCdataElement,
   sym_text, sym_processingInstruction,
   sym_comment, sym_xmlDecl;
 
@@ -31,6 +32,8 @@ public:
 
     sym_startElement = NODE_PSYMBOL("startElement");
     sym_endElement = NODE_PSYMBOL("endElement");
+    sym_startCdataElement = NODE_PSYMBOL("startCdataElement");
+    sym_endCdataElement = NODE_PSYMBOL("endCdataElement");
     sym_text = NODE_PSYMBOL("text");
     sym_processingInstruction = NODE_PSYMBOL("processingInstruction");
     sym_comment = NODE_PSYMBOL("comment");
@@ -66,6 +69,7 @@ protected:
     XML_SetUserData(parser, this);
     XML_SetElementHandler(parser, StartElement, EndElement);
     XML_SetCharacterDataHandler(parser, Text);
+    XML_SetCdataSectionHandler(parser, StartCdataElement, EndCdataElement);
     XML_SetProcessingInstructionHandler(parser, ProcessingInstruction);
     XML_SetCommentHandler(parser, Comment);
     XML_SetXmlDeclHandler(parser, XmlDecl);
@@ -227,6 +231,24 @@ private:
     Handle<Value> argv[1] = { String::New(name) };
     parser->Emit(sym_endElement, 1, argv);
   }
+  
+  static void StartCdataElement(void *userData)
+  {
+    Parser *parser = reinterpret_cast<Parser *>(userData);
+
+    /* Trigger event */
+    Handle<Value> argv[0] = {};
+    parser->Emit(sym_startCdataElement, 0, argv);
+  }
+
+  static void EndCdataElement(void *userData)
+  {
+    Parser *parser = reinterpret_cast<Parser *>(userData);
+
+    /* Trigger event */
+    Handle<Value> argv[0] = {};
+    parser->Emit(sym_endCdataElement, 0, argv);
+  }
 
   static void Text(void *userData,
                    const XML_Char *s, int len)