- It aims to strip html documents and remove 
  non safe contents like emmbed javascript, forms,
  import of externals multimediai contents, ...
  - usefull to display HTML attachments of ingested events
  - Use portal_transforms as conversion engine (and its transform safe_html).
reviewed by Kazuhiko


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@33438 20353a03-c40f-0410-a6d1-a30d3c3de9de