License file

diff --git a/LICENSE.txt b/LICENSE.txt
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+Copyright (c) 2008 Board of Trustees, Princeton University
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and/or hardware specification (the “Work”) to
+deal in the Work without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Work, and to permit persons to whom the Work
+is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Work.
+
+THE WORK IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+OUT OF OR IN CONNECTION WITH THE WORK OR THE USE OR OTHER DEALINGS 
+IN THE WORK.