Add the ability to look up user defined typenames

Closes #124

unittests/type_name_test.cpp

@@ -0,0 +1,22 @@
+// Tests to make sure that the order in which function dispatches occur is correct
+
+#include <chaiscript/chaiscript.hpp>
+#include <cstdlib>
+
+class MyClass
+{
+};
+
+int main()
+{
+  chaiscript::ChaiScript chai;
+  auto type = chaiscript::user_type<MyClass>();
+  chai.add(type, "MyClass");
+
+  if (chai.get_type_name(type) == "MyClass" && chai.get_type_name<MyClass>() == "MyClass")
+  {
+    return EXIT_SUCCESS;
+  } else {
+    return EXIT_FAILURE;
+  }
+}