add license

tools/serial_monitor.py

@@ -1,4 +1,26 @@
 #!/usr/bin/python
+#
+# Copyright (C) 2018 SoloKeys, Inc. <https://solokeys.com/>
+#
+# This file is part of Solo.
+#
+# Solo is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Solo is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Solo.  If not, see <https://www.gnu.org/licenses/>
+#
+# This code is available under licenses for commercial use.
+# Please contact SoloKeys for more information.
+#
+
 # This is a basic, cross-platfrom serial emulator.
 # It will automatically try to reconnect to a serial port that disconnects.
 # Ideal for development with Solo.