Make sure all files have license

Author: brandonmoser

setup.py

@@ -1,3 +1,9 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# Copyright (c) 2015-2018 Digi International Inc.
+
 import re
 import os
 from setuptools import setup, find_packages