Bootstrap styling for ButtonActions
Template for Errors
Add JS widget initialization infrastructure

This can be used by widget specific scripts to register initialization
code. If content is added to the DOM all initializations can be run on
the objects added.

This is for example usefull to initialize Bootstrap popovers.
Support for form in a Boostrap modal component

This adds a ModalForm form class supporting forms in a Bootstrap modal.
Add some CSS fixes
Add checkbox and radio widget templates

No changes to the Python code needed for these widgets.
Date and Datetime widgets

These widgets are based on collective.z3cform.datetime but use the
Bootstrap Datetimepicker from
http://eonasdan.github.io/bootstrap-datetimepicker/