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/AnalogAccelerometer.h

@@ -0,0 +1,57 @@
+/*----------------------------------------------------------------------------*/
+/* 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.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#pragma once
+
+#include <memory>
+#include <string>
+
+#include "AnalogInput.h"
+#include "LiveWindow/LiveWindowSendable.h"
+#include "PIDSource.h"
+#include "SensorBase.h"
+
+namespace frc {
+
+/**
+ * Handle operation of an analog accelerometer.
+ * The accelerometer reads acceleration directly through the sensor. Many
+ * sensors have multiple axis and can be treated as multiple devices. Each is
+ * calibrated by finding the center value over a period of time.
+ */
+class AnalogAccelerometer : public SensorBase,
+                            public PIDSource,
+                            public LiveWindowSendable {
+ public:
+  explicit AnalogAccelerometer(int channel);
+  explicit AnalogAccelerometer(AnalogInput* channel);
+  explicit AnalogAccelerometer(std::shared_ptr<AnalogInput> channel);
+  virtual ~AnalogAccelerometer() = default;
+
+  double GetAcceleration() const;
+  void SetSensitivity(double sensitivity);
+  void SetZero(double zero);
+  double PIDGet() override;
+
+  void UpdateTable() override;
+  void StartLiveWindowMode() override;
+  void StopLiveWindowMode() override;
+  std::string GetSmartDashboardType() const override;
+  void InitTable(std::shared_ptr<ITable> subTable) override;
+  std::shared_ptr<ITable> GetTable() const override;
+
+ private:
+  void InitAccelerometer();
+
+  std::shared_ptr<AnalogInput> m_analogInput;
+  double m_voltsPerG = 1.0;
+  double m_zeroGVoltage = 2.5;
+
+  std::shared_ptr<ITable> m_table;
+};
+
+}  // namespace frc