include IAEA clause in LICENSE

Author: gschnabel

Diff for: LICENSE.MIT renamed to LICENSE

@@ -19,3 +19,6 @@ 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.
+
+Nothing in this license shall be construed as a waiver, either express or implied,
+of any of the privileges and immunities accorded to the IAEA by its Member States.

Diff for: README.md

@@ -72,8 +72,8 @@ G. Schnabel, D. L. Aldama, R. Capote, "How to explain ENDF-6 to computers: A for
 
 ## License
 
-This code is distributed under the MIT license, see the
-accompanying license file for more information.
+This code is distributed under the MIT license augmented
+by an IAEA clause, see the accompanying license file for more information.
 
 Copyright (c) International Atomic Energy Agency (IAEA)