Add cpp examples (#659)

* Added C++ robot project examples and set up sub .clang-format for them

* Ran formatter

wpilibcExamples/src/main/cpp/examples/GyroMecanum/src/Robot.cpp

@@ -0,0 +1,55 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2017 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.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include <AnalogGyro.h>
+#include <IterativeRobot.h>
+#include <Joystick.h>
+#include <RobotDrive.h>
+
+/**
+ * This is a sample program that uses mecanum drive with a gyro sensor to
+ * maintian rotation vectorsin relation to the starting orientation of the robot
+ * (field-oriented controls).
+ */
+class Robot : public frc::IterativeRobot {
+public:
+	void RobotInit() override {
+		// invert the left side motors
+		// you may need to change or remove this to match your robot
+		myRobot.SetInvertedMotor(RobotDrive::kFrontLeftMotor, true);
+		myRobot.SetInvertedMotor(RobotDrive::kRearLeftMotor, true);
+
+		gyro.SetSensitivity(kVoltsPerDegreePerSecond);
+	}
+
+	/**
+	 * Mecanum drive is used with the gyro angle as an input.
+	 */
+	void TeleopPeriodic() override {
+		myRobot.MecanumDrive_Cartesian(joystick.GetX(), joystick.GetY(),
+				joystick.GetZ(), gyro.GetAngle());
+	}
+
+private:
+	// Gyro calibration constant, may need to be adjusted
+	// Gyro value of 360 is set to correspond to one full revolution
+	static constexpr double kVoltsPerDegreePerSecond = 0.0128;
+
+	static constexpr int kFrontLeftMotorPort = 0;
+	static constexpr int kFrontRightMotorPort = 1;
+	static constexpr int kRearLeftMotorPort = 2;
+	static constexpr int kRearRightMotorPort = 3;
+	static constexpr int kGyroPort = 0;
+	static constexpr int kJoystickPort = 0;
+
+	frc::RobotDrive myRobot{kFrontLeftMotorPort, kFrontRightMotorPort,
+			kRearLeftMotorPort, kRearRightMotorPort};
+	frc::AnalogGyro gyro{kGyroPort};
+	frc::Joystick joystick{kJoystickPort};
+};
+
+START_ROBOT_CLASS(Robot)