bug fixes on mstring and jstring.

testing/jstring_test.cpp

@@ -1,5 +1,7 @@
 #include <iostream>
 #include "../JString.h"
+#include <string>
+#include <sstream>
 
 int main(int argc, char **argv) {
 
@@ -45,6 +47,13 @@ int main(int argc, char **argv) {
    std::cout << test1["array[1]"] << std::endl;   
    std::cout << test1["array[2]"] << std::endl;   
 
+   std::string string1 = test1["tester"];
+   std::cout << "from string: " << string1 << std::endl;
+
+   coreutils::MString testout;
+   testout << "this is a test: " << test1["comment"];
+   std::cout << testout << std::endl;
+   
    return 0;
 }