Prepare ntcore for merge into allwpilib.

ntcore/src/dev/native/cpp/main.cpp

@@ -0,0 +1,18 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2017-2018. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include <iostream>
+
+#include "ntcore.h"
+
+int main() {
+  auto myValue = nt::GetEntry(nt::GetDefaultInstance(), "MyValue");
+
+  nt::SetEntryValue(myValue, nt::Value::MakeString("Hello World"));
+
+  std::cout << nt::GetEntryValue(myValue)->GetString() << std::endl;
+}