Update to 2018_v4 image and new build system. (#598)

* Revert "Force OpenCV to 3.1.0 (#602)"

This reverts commit 50ed55e8e2.

* Removes Simulation

* Removes old build system

* Removes old gtest

* Adds new gmock and gtest

* Updates to new ni-libraries

* removes MyRobot (to be replaced)

* moves files to new location

* Adds new sim backend and new test executables

* updates .styleguide and .gitignore

* Changes cpp WPILibVersion to a function

MSVC throws an AV with the old version.

* Disables USBCamera on all systems except for linux

* 2018 NI Libraries

* New build system

wpilibc/src/main/native/include/IterativeRobotBase.h

@@ -0,0 +1,69 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2017. 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 "RobotBase.h"
+
+namespace frc {
+
+/**
+ * IterativeRobotBase implements a specific type of robot program framework,
+ * extending the RobotBase class.
+ *
+ * The IterativeRobotBase class does not implement StartCompetition(), so it
+ * should not be used by teams directly.
+ *
+ * This class provides the following functions which are called by the main
+ * loop, StartCompetition(), at the appropriate times:
+ *
+ * RobotInit() -- provide for initialization at robot power-on
+ *
+ * Init() functions -- each of the following functions is called once when the
+ *                     appropriate mode is entered:
+ *   - DisabledInit()   -- called only when first disabled
+ *   - AutonomousInit() -- called each and every time autonomous is entered from
+ *                         another mode
+ *   - TeleopInit()     -- called each and every time teleop is entered from
+ *                         another mode
+ *   - TestInit()       -- called each and every time test is entered from
+ *                         another mode
+ *
+ * Periodic() functions -- each of these functions is called on an interval:
+ *   - RobotPeriodic()
+ *   - DisabledPeriodic()
+ *   - AutonomousPeriodic()
+ *   - TeleopPeriodic()
+ *   - TestPeriodic()
+ */
+class IterativeRobotBase : public RobotBase {
+ public:
+  virtual void RobotInit();
+  virtual void DisabledInit();
+  virtual void AutonomousInit();
+  virtual void TeleopInit();
+  virtual void TestInit();
+
+  virtual void RobotPeriodic();
+  virtual void DisabledPeriodic();
+  virtual void AutonomousPeriodic();
+  virtual void TeleopPeriodic();
+  virtual void TestPeriodic();
+
+ protected:
+  IterativeRobotBase();
+  virtual ~IterativeRobotBase() = default;
+
+  void LoopFunc();
+
+ private:
+  enum class Mode { kNone, kDisabled, kAutonomous, kTeleop, kTest };
+
+  Mode m_lastMode = Mode::kNone;
+};
+
+}  // namespace frc