Move CameraServer and WPILib headers into their own folder

The old headers were moved into folders because doing so avoids polluting
the system include directories.

Folder names were also normalized to lowercase.

wpilibcExamples/src/main/cpp/examples/PacGoat/include/subsystems/DriveTrain.h

@@ -0,0 +1,79 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2017-2018 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/AnalogGyro.h>
+#include <frc/Encoder.h>
+#include <frc/Spark.h>
+#include <frc/SpeedControllerGroup.h>
+#include <frc/commands/Subsystem.h>
+#include <frc/drive/DifferentialDrive.h>
+
+namespace frc {
+class Joystick;
+}  // namespace frc
+
+/**
+ * The DriveTrain subsystem controls the robot's chassis and reads in
+ * information about it's speed and position.
+ */
+class DriveTrain : public frc::Subsystem {
+ public:
+  DriveTrain();
+
+  /**
+   * When other commands aren't using the drivetrain, allow tank drive
+   * with
+   * the joystick.
+   */
+  void InitDefaultCommand();
+
+  /**
+   * @param leftAxis Left sides value
+   * @param rightAxis Right sides value
+   */
+  void TankDrive(double leftAxis, double rightAxis);
+
+  /**
+   * Stop the drivetrain from moving.
+   */
+  void Stop();
+
+  /**
+   * @return The encoder getting the distance and speed of left side of
+   * the drivetrain.
+   */
+  frc::Encoder& GetLeftEncoder();
+
+  /**
+   * @return The encoder getting the distance and speed of right side of
+   * the drivetrain.
+   */
+  frc::Encoder& GetRightEncoder();
+
+  /**
+   * @return The current angle of the drivetrain.
+   */
+  double GetAngle();
+
+ private:
+  // Subsystem devices
+  frc::Spark m_frontLeftCIM{1};
+  frc::Spark m_rearLeftCIM{2};
+  frc::SpeedControllerGroup m_leftCIMs{m_frontLeftCIM, m_rearLeftCIM};
+
+  frc::Spark m_frontRightCIM{3};
+  frc::Spark m_rearRightCIM{4};
+  frc::SpeedControllerGroup m_rightCIMs{m_frontRightCIM, m_rearRightCIM};
+
+  frc::DifferentialDrive m_robotDrive{m_leftCIMs, m_rightCIMs};
+
+  frc::Encoder m_rightEncoder{1, 2, true, frc::Encoder::k4X};
+  frc::Encoder m_leftEncoder{3, 4, false, frc::Encoder::k4X};
+  frc::AnalogGyro m_gyro{0};
+};