----------------
New features:
- Added ``EXPERIMENTAL_NODTML_ONLY_WARN`` option. [maurits]
Bug fixes:
- Interpret value of ``SHOW_ORIGINAL_DTML`` as true value.
Accepted True values are: ``true``, ``t``, ``1``, ``yes``, ``y``.
[maurits]
- Show arguments and keyword arguments when ``SHOW_ORIGINAL_DTML`` is true.
[maurits]
- Return empty string instead of empty unicode by default. Otherwise
you get exceptions when loading dtml files in for example the css
registry on Plone 4.3. [maurits]