Copyright © 2009 Matt Morrow & Dan Peebles, © 2013 Liyang HU
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
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    * Redistributions of source code must retain the above copyright
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    * Neither the name of Matt Morrow nor Dan Peebles nor Liyang HU
      nor the names of any other contributors may be used to endorse
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