A library for providing useful diffs between related HTML documents. Algorithm based on:
G. Cobena, S. Abiteboul, and A. Marian, “Detecting changes in XML documents,” in International Conference on Data Engineering, 2002, pp. 41–52. http://gregory.cobena.free.fr/www/Publications/%5BICDE2002%5D%20XyDiff%20-%20published%20version.pdf