HtmlCleaner is a project originally developed by Vladimir Nikic (http://htmlcleaner.sourceforge.net/). This version is modified by Zheng Sun. Briefly speaking, the modifications are * Added *final* keyword to variables if possible, to avoid memory leaks * Changed some methods for better performance * Add new class *FastHtmlSerializer* to output the HTML tree non-recursively, to avoid stack overflow (especially for Android) * Other minor changes HtmlCleaner is used as HTML parser in EasyRSS (http://easyrss.pursuer.me/). Author: Zheng Sun (http://pursuer.me).