Move the Sudden Motion Sensor library into third_party.

third_party/sudden_motion_sensor/LICENSE

+SMSLib Sudden Motion Sensor Access Library
+Copyright (c) 2010 Suitable Systems
+All rights reserved.
+
+Developed by: Daniel Griscom
+              Suitable Systems
+              http://www.suitable.com
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal with 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:
+
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimers.
+
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimers in the
+documentation and/or other materials provided with the distribution.
+
+- Neither the names of Suitable Systems nor the names of its
+contributors may be used to endorse or promote products derived from
+this Software without specific prior written permission.
+
+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 CONTRIBUTORS 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 WITH THE SOFTWARE.
+
+For more information about SMSLib, see
+   <http://www.suitable.com/tools/smslib.html>
+or contact
+   Daniel Griscom
+   Suitable Systems
+   1 Centre Street, Suite 204
+   Wakefield, MA 01880
+   (781) 665-0053