-------------------
- Make ``KeywordsVocabulary`` more customizable using an ``keyword_index``
class variable to allow users to inherit and just override that attribute
to build their own keyword vocabularies.
[saily]
- Add datetime related vocabularies: timezones, weekdays, months.
This are moved from ``plone.app.event`` and extended by to be more
complete.
[yenzenz]
- Add catalog source which can eventually replace the vocabulary.
[davisagli]