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/cpp/IterativeRobot.cpp

@@ -0,0 +1,34 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2008-2017. 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 "IterativeRobot.h"
+
+#include "DriverStation.h"
+#include "HAL/HAL.h"
+
+using namespace frc;
+
+IterativeRobot::IterativeRobot() {
+  HAL_Report(HALUsageReporting::kResourceType_Framework,
+             HALUsageReporting::kFramework_Iterative);
+}
+
+/**
+ * Provide an alternate "main loop" via StartCompetition().
+ *
+ * This specific StartCompetition() implements "main loop" behaviour synced with
+ * the DS packets.
+ */
+void IterativeRobot::StartCompetition() {
+  // Loop forever, calling the appropriate mode-dependent function
+  while (true) {
+    // wait for driver station data so the loop doesn't hog the CPU
+    DriverStation::GetInstance().WaitForData();
+
+    LoopFunc();
+  }
+}