Changed ::String to ArduinoJson::String (issue #275)

include/ArduinoJson/String.hpp

@@ -0,0 +1,24 @@
+// Copyright Benoit Blanchon 2014-2016
+// MIT License
+//
+// Arduino JSON library
+// https://github.com/bblanchon/ArduinoJson
+// If you like this project, please add a star!
+
+#pragma once
+
+#include "Configuration.hpp"
+
+#if ARDUINOJSON_USE_ARDUINO_STRING
+
+#include <WString.h>
+
+#else
+
+#include <string>
+
+namespace ArduinoJson {
+typedef std::string String;
+}
+
+#endif