Copyright (C) 2014 - 2015 Xiao Wang
This program is free software: you can redistribute it and/or modify it under the terms of the Creative Commons Attribution-NonCommercial license.
This program 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 Creative Commons Attribution-NonCommercial license for more details.
You should have received a copy of the Creative Commons Attribution-NonCommercial license. If not, see http://creativecommons.org/licenses/by-nc/4.0/