Preparing for Teensy 3 (ARM) integration, abstracting code hierarchy

- Abstracted USB Module
- Abstracted compiler specific includes for Scan, Macro, Debug, and USB modules
- Updated CMake build files to support changes
- Added abstractions necessary to main.c as well as a compiler specific include file

Macro/buffer/macro.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2011 by Jacob Alexander
+/* Copyright (C) 2011-2013 by Jacob Alexander
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -21,9 +21,8 @@
 
 // ----- Includes -----
 
-// AVR Includes
-#include <util/delay.h>
-#include <avr/interrupt.h>
+// Compiler Includes
+#include <Lib/MacroLib.h>
 
 // Project Includes
 #include <led.h>