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/smartdashboard/SendableChooserBase.h

@@ -0,0 +1,38 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2017-2018 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 <string>
+
+#include <networktables/NetworkTableEntry.h>
+
+#include "frc/smartdashboard/SendableBase.h"
+
+namespace frc {
+
+/**
+ * This class is a non-template base class for SendableChooser.
+ *
+ * It contains static, non-templated variables to avoid their duplication in the
+ * template class.
+ */
+class SendableChooserBase : public SendableBase {
+ public:
+  SendableChooserBase();
+  ~SendableChooserBase() override = default;
+
+ protected:
+  static constexpr const char* kDefault = "default";
+  static constexpr const char* kOptions = "options";
+  static constexpr const char* kSelected = "selected";
+
+  std::string m_defaultChoice;
+  nt::NetworkTableEntry m_selectedEntry;
+};
+
+}  // namespace frc