Added disclaimer and license files to repository.

DISCLAIMER

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+This material was prepared as an account of work sponsored by an agency of the
+United States Government.  Neither the United States Government nor the United
+States Department of Energy, nor Battelle, nor any of their employees, nor any
+jurisdiction or organization that has cooperated in the development of these
+materials, makes any warranty, express or implied, or assumes any legal
+liability or responsibility for the accuracy, completeness, or usefulness or
+any information, apparatus, product, software, or process disclosed, or
+represents that its use would not infringe privately owned rights.
+
+Reference herein to any specific commercial product, process, or service by
+trade name, trademark, manufacturer, or otherwise does not necessarily
+constitute or imply its endorsement, recommendation, or favoring by the United
+States Government or any agency thereof, or Battelle Memorial Institute. The
+views and opinions of authors expressed herein do not necessarily state or
+reflect those of the United States Government or any agency thereof.
+
+                 PACIFIC NORTHWEST NATIONAL LABORATORY
+                              operated by
+                                BATTELLE
+                                for the
+                   UNITED STATES DEPARTMENT OF ENERGY
+                    under Contract DE-AC05-76RL01830

LICENSE

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+Copyright Battelle Memorial Institute 2023
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation
+and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.