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.

hal/lib/athena/Power.cpp

@@ -0,0 +1,138 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 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.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include "HAL/Power.hpp"
+#include "ChipObject.h"
+
+static tPower* power = NULL;
+
+static void initializePower(int32_t* status) {
+  if (power == NULL) {
+    power = tPower::create(status);
+  }
+}
+
+extern "C" {
+
+/**
+ * Get the roboRIO input voltage
+ */
+float getVinVoltage(int32_t* status) {
+  initializePower(status);
+  return power->readVinVoltage(status) / 4.096f * 0.025733f - 0.029f;
+}
+
+/**
+ * Get the roboRIO input current
+ */
+float getVinCurrent(int32_t* status) {
+  initializePower(status);
+  return power->readVinCurrent(status) / 4.096f * 0.017042 - 0.071f;
+}
+
+/**
+ * Get the 6V rail voltage
+ */
+float getUserVoltage6V(int32_t* status) {
+  initializePower(status);
+  return power->readUserVoltage6V(status) / 4.096f * 0.007019f - 0.014f;
+}
+
+/**
+ * Get the 6V rail current
+ */
+float getUserCurrent6V(int32_t* status) {
+  initializePower(status);
+  return power->readUserCurrent6V(status) / 4.096f * 0.005566f - 0.009f;
+}
+
+/**
+ * Get the active state of the 6V rail
+ */
+bool getUserActive6V(int32_t* status) {
+  initializePower(status);
+  return power->readStatus_User6V(status) == 4;
+}
+
+/**
+ * Get the fault count for the 6V rail
+ */
+int getUserCurrentFaults6V(int32_t* status) {
+  initializePower(status);
+  return (int)power->readFaultCounts_OverCurrentFaultCount6V(status);
+}
+
+/**
+ * Get the 5V rail voltage
+ */
+float getUserVoltage5V(int32_t* status) {
+  initializePower(status);
+  return power->readUserVoltage5V(status) / 4.096f * 0.005962f - 0.013f;
+}
+
+/**
+ * Get the 5V rail current
+ */
+float getUserCurrent5V(int32_t* status) {
+  initializePower(status);
+  return power->readUserCurrent5V(status) / 4.096f * 0.001996f - 0.002f;
+}
+
+/**
+ * Get the active state of the 5V rail
+ */
+bool getUserActive5V(int32_t* status) {
+  initializePower(status);
+  return power->readStatus_User5V(status) == 4;
+}
+
+/**
+ * Get the fault count for the 5V rail
+ */
+int getUserCurrentFaults5V(int32_t* status) {
+  initializePower(status);
+  return (int)power->readFaultCounts_OverCurrentFaultCount5V(status);
+}
+
+unsigned char getUserStatus5V(int32_t* status) {
+  initializePower(status);
+  return power->readStatus_User5V(status);
+}
+
+/**
+ * Get the 3.3V rail voltage
+ */
+float getUserVoltage3V3(int32_t* status) {
+  initializePower(status);
+  return power->readUserVoltage3V3(status) / 4.096f * 0.004902f - 0.01f;
+}
+
+/**
+ * Get the 3.3V rail current
+ */
+float getUserCurrent3V3(int32_t* status) {
+  initializePower(status);
+  return power->readUserCurrent3V3(status) / 4.096f * 0.002486f - 0.003f;
+}
+
+/**
+ * Get the active state of the 3.3V rail
+ */
+bool getUserActive3V3(int32_t* status) {
+  initializePower(status);
+  return power->readStatus_User3V3(status) == 4;
+}
+
+/**
+ * Get the fault count for the 3.3V rail
+ */
+int getUserCurrentFaults3V3(int32_t* status) {
+  initializePower(status);
+  return (int)power->readFaultCounts_OverCurrentFaultCount3V3(status);
+}
+
+}  // extern "C"