-New helpers to render HTML to text, and to sanitize user input by stripping
``markdown()`` adds an argument to choose a Markdown implementation.
The Markdown included in WebHelpers will remain at version 1.7, but Markdown
2.x is available on PyPI, and a separate implementation confusingly called
"Markdown2" is also available on PyPI.
+New helpers to render HTML to text, and to sanitize user input by stripping