Add a JsonEncodedList type
Custom datetime widget allowing format customisation
Making some cleaning in activity view module
Add a datetime node constructor
Adding a missing template
Upgrade deform related packages
Clear date altfield on input clear
Provide a custom form template for search forms
Provide an updated BaseListView using the searchform

previously we used to build the form manually in our html templates.

now that we have a confortable template, we use it.
Provide custom classes for chozen widgets

this way chozen widgets are displayed correctly in search forms
use the deform search form in actitities list
Add some widget tuning for the base search form

List view now uses deform for form rendering
add datetime formatting
Allow to pass widget_options to user nodes
Deform tuning for the actitivy list form
Use the new schema builder for activity list form schema
Use our new list view stuff in invoices list
use a custom ChosenOptGroupwidget

The widget provided by deform_bootstrap doesn't allow to unselect an
element (you can't provide a single option)
Fix .btn styled tags font-size
Add models for workshop handling