Update NOTICE (neuralmagic#18)

* Update NOTICE

proposing language, specifically around the model derivatives.

NOTICE

@@ -1,8 +1,10 @@
-Copyright (c) 2021 - present / Neuralmagic, Inc. All Rights Reserved.
+SparseZoo
+Copyright 2021 - present / Neuralmagic, Inc. All Rights Reserved.
+
+This product includes software developed at Neuralmagic, Inc. (https://www.neuralmagic.com).
 
 Source code in this repository is variously licensed under the Apache License
-Version 2.0, an Apache-compatible license. Please see
-LICENSE for more information.
+Version 2.0, an Apache-compatible license.
 
 * For a copy of the Apache License Version 2.0, please see LICENSE
   as included in this repository's top-level directory.
@@ -17,4 +19,11 @@ LICENSE for more information.
 NOTICES
 ========================================================================
 
-None listed
+All implementations in this repository are subject to Neural Magic's Legal Policies
+https://www.neuralmagic.com/legal
+
+Package dependencies are defined in the Python setup.py file in this repository's top-level directory and have their own Apache-compatible licenses and terms.
+
+Other external dependencies, if referenced in this repository's various subdirectories, are subject to their associated licenses and terms.
+
+Models that are derivatives of other model frameworks are indicated as such in the SparseZoo repository and are used in accordance with their original licenses and terms.