Add NOTICE file for GNM.

LICENSE

@@ -199,4 +199,33 @@
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
-   limitations under the License.
+   limitations under the License.
+
+================================================================================
+Third-Party Component Licenses
+================================================================================
+
+A portion of this repository, specifically the tongue animation meshes for the
+articulation of the tongue inside of the mouth was adapted from work by Salvador
+Medina, which is licensed under the MIT License:
+
+Copyright (c) 2022 Salvador Medina
+
+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.
+

README.md

@@ -17,8 +17,8 @@ community research and open development, we are beginning our open-source
 release with **GNM Head**, our high-fidelity statistical 3D model of the human
 head.
 
-The ecosystem is released under a permissive license suitable for both
-non-commercial and commercial applications.
+The ecosystem is released under the Apache 2.0 permissive license suitable for
+both non-commercial and commercial applications.
 
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