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

myRobot/src/main/native/cpp/MyRobot.cpp

@@ -0,0 +1,48 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2016-2017. 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.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include "WPILib.h"
+
+class MyRobot : public IterativeRobot {
+  /**
+   * This function is run when the robot is first started up and should be
+   * used for any initialization code.
+   */
+  void RobotInit() override {}
+
+  /**
+   * This function is run once each time the robot enters autonomous mode
+   */
+  void AutonomousInit() override {}
+
+  /**
+   * This function is called periodically during autonomous
+   */
+  void AutonomousPeriodic() override {}
+
+  /**
+   * This function is called once each time the robot enters tele-operated mode
+   */
+  void TeleopInit() override {}
+
+  /**
+   * This function is called periodically during operator control
+   */
+  void TeleopPeriodic() override {}
+
+  /**
+   * This function is called periodically during test mode
+   */
+  void TestPeriodic() override {}
+
+  /**
+   * This function is called periodically during all modes
+   */
+  void RobotPeriodic() override {}
+};
+
+START_ROBOT_CLASS(MyRobot)