Add LUFA license as a separate file prior to code cleanup

LUFA_LICENSE

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+                  LUFA Library
+        Copyright (C) Dean Camera, 2014.
+
+     dean [at] fourwalledcubicle [dot] com
+                www.lufa-lib.org
+
+
+Permission to use, copy, modify, and distribute this software
+and its documentation for any purpose is hereby granted without
+fee, provided that the above copyright notice appear in all
+copies and that both that the copyright notice and this
+permission notice and warranty disclaimer appear in supporting
+documentation, and that the name of the author not be used in
+advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+The author disclaims all warranties with regard to this
+software, including all implied warranties of merchantability
+and fitness.  In no event shall the author be liable for any
+special, indirect or consequential damages or any damages
+whatsoever resulting from loss of use, data or profits, whether
+in an action of contract, negligence or other tortious action,
+arising out of or in connection with the use or performance of
+this software.