added b64 encode/decode to MString.

Base64.h

@@ -1,20 +1,22 @@
 #ifndef __Base64_h__
 #define __Base64_h__
 
-#include <string>
+#include "ZString.h"
+#include "MString.h"
 
 namespace coreutils {
 
    ///
-   ///
+   /// Use the Base64 object when you need to translate character string
+   /// to/from base64 encoded strings.
    ///
    
    class Base64 {
    
     public:
       bool isBase64(unsigned char c);
-      std::string encode(unsigned char const* bytes_to_encode, unsigned int in_len);	  	   
-      std::string decode(std::string const& encoded_string);
+      MString encode(ZString data);	  	   
+      MString decode(ZString b64data);
          
    };