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/sim/include/AnalogInput.h

@@ -0,0 +1,60 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2008-2016. 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.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#pragma once
+
+#include "LiveWindow/LiveWindowSendable.h"
+#include "PIDSource.h"
+#include "SensorBase.h"
+#include "simulation/SimFloatInput.h"
+
+#include <memory>
+
+/**
+ * Analog input class.
+ *
+ * Connected to each analog channel is an averaging and oversampling engine.
+ * This engine accumulates the specified ( by SetAverageBits() and
+ * SetOversampleBits() ) number of samples before returning a new value.  This
+ * is not a sliding window average.  The only difference between the
+ * oversampled samples and the averaged samples is that the oversampled samples
+ * are simply accumulated effectively increasing the resolution, while the
+ * averaged samples are divided by the number of samples to retain the
+ * resolution, but get more stable values.
+ */
+class AnalogInput : public SensorBase,
+                    public PIDSource,
+                    public LiveWindowSendable {
+ public:
+  static const uint8_t kAccumulatorModuleNumber = 1;
+  static const uint32_t kAccumulatorNumChannels = 2;
+  static const uint32_t kAccumulatorChannels[kAccumulatorNumChannels];
+
+  explicit AnalogInput(uint32_t channel);
+  virtual ~AnalogInput() = default;
+
+  float GetVoltage() const;
+  float GetAverageVoltage() const;
+
+  uint32_t GetChannel() const;
+
+  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:
+  uint32_t m_channel;
+  SimFloatInput* m_impl;
+  int64_t m_accumulatorOffset;
+
+  std::shared_ptr<ITable> m_table;
+};