Copyright (C) 2013 Siavash Ameli

This source code is provided 'as-is', without any express or implied
warranty. In no event will the author be held liable for any damages
arising from the use of this software.

Permission is granted to anyone to use this software for NON-commercial 
purpose, to alter it and redistribute it freely, subject to the following 
restrictions:

   1. The origin of this source code must not be misrepresented; you must not
      claim that you wrote the original source code. 

   2. You may modify or alter the source code at your own risk, provided
      that such modifications are extensively commented. Altered source
      versions must not be misrepresented as being the original source code.

   3. If you use this source code in a non-commercial product, an acknowledgment 
      in the product documentation would be appreciated.

   4. This notice may not be removed or altered from any source distribution.

Siavash Ameli <sameli at berkeley dot edu>
Shadden Research Group
University of California, Berkeley