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/Resource.h

@@ -0,0 +1,51 @@
+/*----------------------------------------------------------------------------*/
+/* 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 <stdint.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "ErrorBase.h"
+#include "HAL/cpp/priority_mutex.h"
+
+namespace frc {
+
+/**
+ * The Resource class is a convenient way to track allocated resources.
+ * It tracks them as indicies in the range [0 .. elements - 1].
+ * E.g. the library uses this to track hardware channel allocation.
+ *
+ * The Resource class does not allocate the hardware channels or other
+ * resources; it just tracks which indices were marked in use by
+ * Allocate and not yet freed by Free.
+ */
+class Resource : public ErrorBase {
+ public:
+  virtual ~Resource() = default;
+
+  Resource(const Resource&) = delete;
+  Resource& operator=(const Resource&) = delete;
+
+  static void CreateResourceObject(std::unique_ptr<Resource>& r,
+                                   uint32_t elements);
+  explicit Resource(uint32_t size);
+  uint32_t Allocate(const std::string& resourceDesc);
+  uint32_t Allocate(uint32_t index, const std::string& resourceDesc);
+  void Free(uint32_t index);
+
+ private:
+  std::vector<bool> m_isAllocated;
+  hal::priority_recursive_mutex m_allocateLock;
+
+  static hal::priority_recursive_mutex m_createLock;
+};
+
+}  // namespace frc