Renamed folders for consistency, using sim/athena/shared schema (#27)

Rename the following folders:
hal/lib/Athena -> hal/lib/athena
hal/lib/Desktop -> hal/lib/sim
hal/lib/Shared -> hal/lib/shared
wpilibc/Athena -> wpilibc/athena
wpilibc/simulation -> wpilibc/sim

Windows users may need to run gradlew clean after updating.

wpilibc/athena/include/Compressor.h

@@ -0,0 +1,66 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2014-2016. 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.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#ifndef Compressor_H_
+#define Compressor_H_
+
+#include "HAL/HAL.hpp"
+#include "LiveWindow/LiveWindowSendable.h"
+#include "SensorBase.h"
+#include "tables/ITableListener.h"
+
+#include <memory>
+
+/**
+ * PCM compressor
+ */
+class Compressor : public SensorBase,
+                   public LiveWindowSendable,
+                   public ITableListener {
+ public:
+  // Default PCM ID is 0
+  explicit Compressor(uint8_t pcmID = GetDefaultSolenoidModule());
+  virtual ~Compressor() = default;
+
+  void Start();
+  void Stop();
+  bool Enabled() const;
+
+  bool GetPressureSwitchValue() const;
+
+  float GetCompressorCurrent() const;
+
+  void SetClosedLoopControl(bool on);
+  bool GetClosedLoopControl() const;
+
+  bool GetCompressorCurrentTooHighFault() const;
+  bool GetCompressorCurrentTooHighStickyFault() const;
+  bool GetCompressorShortedStickyFault() const;
+  bool GetCompressorShortedFault() const;
+  bool GetCompressorNotConnectedStickyFault() const;
+  bool GetCompressorNotConnectedFault() const;
+  void ClearAllPCMStickyFaults();
+
+  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;
+  void ValueChanged(ITable* source, llvm::StringRef key,
+                    std::shared_ptr<nt::Value> value, bool isNew) override;
+
+ protected:
+  void* m_pcm_pointer;
+
+ private:
+  void SetCompressor(bool on);
+
+  std::shared_ptr<ITable> m_table;
+};
+
+#endif /* Compressor_H_ */