Continues ZString and MString adjustments.

MString.h

@@ -44,6 +44,8 @@ namespace coreutils {
 
       MString(ZString &zstring);
 
+      MString(ZString zstring);
+
       ///
       /// Consructor providing a copy of a ZString.
       ///
@@ -62,13 +64,15 @@ namespace coreutils {
       /// Assignment operator will copy data to backing store.
       ///
 
-      MString& operator=(coreutils::ZString& data);
+//      MString& operator=(coreutils::ZString& data);
 
       ///
       /// Assignment operator will copy data to backing store.
       ///
 
-      MString& operator=(coreutils::MString& data);
+//      MString& operator=(coreutils::ZString& data);
+
+      MString& operator=(coreutils::ZString data);
 
       ///
       /// Assignment operator will copy data to backing store.
@@ -90,7 +94,9 @@ namespace coreutils {
 
       MString& operator<<(const int value);     
 
-      MString& operator<<(coreutils::ZString &zstring);     
+//      MString& operator<<(coreutils::ZString &zstring);     
+
+      MString& operator<<(coreutils::ZString zstring);     
 
       MString& operator<<(std::string value);