------------------
- Upgrade pat-leaflet to 1.3.0.
[thet]
- Remove 2nd CSS resource from Leaflet Markercluster as Plone doesn't compile it properly.
[thet]
- Register ``pat-date-picker``.
[thet]
- Update dependencies, deped on Patterns 2.1.x.
[thet]
- Update to latest Patterns.
[thet]
- Remove registry initialization in bundles.
[cekk]
- Declare support for python 3.
[vincero]