Add LICENSE file

LICENSE

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+Copyright and License Terms
+---------------------------
+
+Copyright (c) 2006-2016 Martin R. Kraimer
+Copyright (c) 2006-2016 UChicago Argonne LLC, as Operator of Argonne
+     National Laboratory.
+Copyright (c) 2006 Deutsches Elektronen-Synchrotron,
+     Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY.
+Copyright (c) 2007-2016 Control System Laboratory,
+    (COSYLAB) Ljubljana Slovenia
+Copyright (c) 2010-2016 Brookhaven Science Associates, as Operator
+    of Brookhaven National Laboratory
+Copyright (c) 2011-2016 Diamond Light Source Limited,
+    (DLS) Didcot, United Kingdom
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software 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 Software.
+
+THE SOFTWARE 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 SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+________________________________________________________________________
+
+Additional Disclaimers
+----------------------
+
+This software is copyright in part by these institutions:
+
+  * Brookhaven Science Associates, as Operator of Brookhaven
+    National Laboratory, New York, USA
+  * Control System Laboratory, Ljubljana, Slovenia
+  * Deutsches Elektronen-Synchroton, Member of the Helmholtz
+    Association, Hamburg, Germany
+  * Diamond Light Source Limited, Didcot, United Kingdom
+  * Helmholtz-Zentrum Berlin fuer Materialien und Energie m.b.H.,
+    Berlin, Germany.
+  * UChicage Argonne LLC, as Operator of Argonne National Laboratory,
+    Illinois, USA
+
+In no event shall these institutions be liable to any party for direct,
+indirect, special, incidental, or consequential damages arising out of
+the use of this software, its documentation, or any derivatives thereof,
+even if advised of the possibility of such damage.
+
+These institutions specifically disclaim any warranties, including, but
+not limited to, the implied warranties of merchantability, fitness for a
+particular purpose, and non-infringement. This software is provided on
+an "as is" basis, and these institutions have no obligation to provide
+maintenance, support, updates, enhancements, or modifications.
+