michael@0: Copyright (c) 2014, Michael Bostock
michael@0: All rights reserved.
michael@0: 
michael@0: Redistribution and use in source and binary forms, with or without
michael@0: modification, are permitted provided that the following conditions are met:
michael@0: 
michael@0: * Redistributions of source code must retain the above copyright notice, this
michael@0:   list of conditions and the following disclaimer.
michael@0: 
michael@0: * Redistributions in binary form must reproduce the above copyright notice,
michael@0:   this list of conditions and the following disclaimer in the documentation
michael@0:   and/or other materials provided with the distribution.
michael@0: 
michael@0: * The name Michael Bostock may not be used to endorse or promote products
michael@0:   derived from this software without specific prior written permission.
michael@0: 
michael@0: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
michael@0: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
michael@0: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
michael@0: DISCLAIMED. IN NO EVENT SHALL MICHAEL BOSTOCK BE LIABLE FOR ANY DIRECT,
michael@0: INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
michael@0: BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
michael@0: DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
michael@0: OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
michael@0: NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
michael@0: EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.