MString now string builds with << operator.

testing/mstring_test.cpp

@@ -20,11 +20,15 @@ int main(int argc, char **argv) {
    coreutils::MString test4;
    test4 << "this is a test.";
    std::cout << "char* operator<<: [" << test4 << "]." << std::endl;   
+   test4 << "another test " << 75;
+   std::cout << "char* operator<<: [" << test4 << "]." << std::endl;   
       
-//   coreutils::ZString temp("this is literal zstring data.");
-//   coreutils::MString test = temp;
-//   std::cout << "operator=: [" << test << "]." << std::endl;   
-   
+   // Stream assignment capabilities.
+   coreutils::MString test6;
+   int number = 75;
+   test6 << "Will this work? " << number << test4 << " See how this works.";
+   std::cout << "streaming: [" << test6 << "]." << std::endl;   
+
    return 0;
 }