Fix HtmlSanitizer to return cleaned string in proper encoding.
Fix HtmlSanitizer to return cleaned string in proper encoding.

This fix prevent HtmlSanitizer from throwing UnicodeDecodeError exception.

--HG--
extra : rebase_source : e8dcf87113eddb4fa1b04ea494d2139b2c84cc29

rhyolight/nupic.son,rhyolight/nupic.son,rhyolight/nupic.son