Content Extraction via Text Density (CETD) program provides algorithms
to detect and remove the additional content (e.g. ads, navigation menus, copyright notices etc)
around the main content of a webpage.
see http://disnet.cs.bit.edu.cn/

License
 For RapidXMl, refer to http://rapidxml.sourceforge.net/
 The others are under the GPL version 3, read it at http://www.gnu.org/licenses/gpl.txtLicense