Create LICENSE

LICENSE

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+= License =
+
+The majority of the MCViNE software is distributed under a BSD license, 
+in accordance with the license policy of the DANSE project.
+
+This software is part of the open-source DANSE project at the California
+Institute of Technology, and is available subject to the conditions and
+terms laid out below. By downloading and using this software you are
+agreeing to the following conditions.
+
+
+{{{
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met::
+
+    - Redistribution of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    - Redistribution in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentations and/or other materials provided with the distribution.
+
+    - Neither the name of the California Institute of Technology nor
+      the names of its contributors may be used to endorse or promote
+      products derived from this software without specific prior written
+      permission.
+
+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 OWNER 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.
+
+Copyright (c) 2006-2015 California Institute of Technology. All rights reserved.
+
+
+}}}
+
+If you use this software to do productive scientific research that leads to
+publication, please acknowledge use of the software by citing the
+following paper in your publication:
+
+    Jiao Y. Y. Lin, Michael Aivazis, and Brent Fultz, 
+    ''MCViNE: Monte Carlo VItual Neutron Experiment'', http://mcvine.github.io (unpublished)
+
+
+----
+==== License for the McStas adaptation package ====
+
+In MCViNE, an adaptation package for [http://mcstas.org McStas] is under GPL license. 
+See https://github.com/mcvine/mcvine/blob/master/packages/legacycomponents/mcstas2/README 
+for more details.