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/FRC_FPGA_ChipObject/tSystem.h

@@ -0,0 +1,48 @@
+// Base class for generated chip objects
+// Copyright (c) National Instruments 2008.  All Rights Reserved.
+
+#ifndef __tSystem_h__
+#define __tSystem_h__
+
+#include "fpgainterfacecapi/NiFpga.h"
+typedef NiFpga_Status tRioStatusCode;
+
+#define FRC_FPGA_PRELOAD_BITFILE
+
+typedef uint32_t NiFpga_Session;
+
+namespace nFPGA
+{
+
+class tSystem
+{
+public:
+   tSystem(tRioStatusCode *status);
+   ~tSystem();
+   void getFpgaGuid(uint32_t *guid_ptr, tRioStatusCode *status);
+   void reset(tRioStatusCode *status);
+
+protected:
+   static NiFpga_Session _DeviceHandle;
+
+#ifdef FRC_FPGA_PRELOAD_BITFILE
+   void NiFpga_SharedOpen_common(const char*     bitfile);
+   NiFpga_Status NiFpga_SharedOpen(const char*     bitfile,
+                            const char*     signature,
+                            const char*     resource,
+                            uint32_t        attribute,
+                            NiFpga_Session* session);
+   NiFpga_Status NiFpgaLv_SharedOpen(const char* const     bitfile,
+                            const char* const     apiSignature,
+                            const char* const     resource,
+                            const uint32_t        attribute,
+                            NiFpga_Session* const session);
+private:
+    static char *_FileName;
+    static char *_Bitfile;
+#endif
+};
+
+}
+
+#endif // __tSystem_h__