Add template for old command-based style (#2031)

wpilibcExamples/src/main/cpp/templates/oldcommandbased/include/subsystems/ExampleSubsystem.h

@@ -0,0 +1,20 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2019 FIRST. 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.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#pragma once
+
+#include <frc/commands/Subsystem.h>
+
+class ExampleSubsystem : public frc::Subsystem {
+ public:
+  ExampleSubsystem();
+  void InitDefaultCommand() override;
+
+ private:
+  // It's desirable that everything possible under private except
+  // for methods that implement subsystem capabilities
+};