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/Vision/ImageBase.h

@@ -0,0 +1,27 @@
+/*----------------------------------------------------------------------------*/
+/* 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.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#pragma once
+
+#include <stdio.h>
+#include "ErrorBase.h"
+#include "nivision.h"
+
+#define DEFAULT_BORDER_SIZE 3
+
+class ImageBase : public ErrorBase {
+ public:
+  ImageBase(ImageType type);
+  virtual ~ImageBase();
+  virtual void Write(const char* fileName);
+  int GetHeight();
+  int GetWidth();
+  Image* GetImaqImage();
+
+ protected:
+  Image* m_imaqImage;
+};