Log Message:
Changes 0.90:
* Parses valid and invalid HTML documents to a tree
* Support for minidom, ElementTree (including cElementTree and lxml.etree),
  BeautifulSoup (deprecated) and custom simpletree output formats
* DOM to SAX converter
* Reports parse errors
* Character encoding detection
* Filtering and serializing of trees
* HTML+CSS sanitizer
* Many unit tests