Move CameraServer and WPILib headers into their own folder

The old headers were moved into folders because doing so avoids polluting
the system include directories.

Folder names were also normalized to lowercase.

wpilibc/src/main/native/include/frc/Threads.h

@@ -0,0 +1,58 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2016-2018 FIRST. 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 <thread>
+
+namespace frc {
+
+/**
+ * Get the thread priority for the specified thread.
+ *
+ * @param thread     Reference to the thread to get the priority for.
+ * @param isRealTime Set to true if thread is realtime, otherwise false.
+ * @return The current thread priority. Scaled 1-99, with 1 being highest.
+ */
+int GetThreadPriority(std::thread& thread, bool* isRealTime);
+
+/**
+ * Get the thread priority for the current thread
+ *
+ * @param isRealTime Set to true if thread is realtime, otherwise false.
+ * @return The current thread priority. Scaled 1-99.
+ */
+int GetCurrentThreadPriority(bool* isRealTime);
+
+/**
+ * Sets the thread priority for the specified thread
+ *
+ * @param thread   Reference to the thread to set the priority of.
+ * @param realTime Set to true to set a realtime priority, false for standard
+ *                 priority.
+ * @param priority Priority to set the thread to. Scaled 1-99, with 1 being
+ *                 highest. On RoboRIO, priority is ignored for non realtime
+ *                 setting.
+ *
+ * @return The success state of setting the priority
+ */
+bool SetThreadPriority(std::thread& thread, bool realTime, int priority);
+
+/**
+ * Sets the thread priority for the current thread
+ *
+ * @param realTime Set to true to set a realtime priority, false for standard
+ *                 priority.
+ * @param priority Priority to set the thread to. Scaled 1-99, with 1 being
+ *                 highest. On RoboRIO, priority is ignored for non realtime
+ *                 setting.
+ *
+ * @return The success state of setting the priority
+ */
+bool SetCurrentThreadPriority(bool realTime, int priority);
+
+}  // namespace frc