allow to use renderer in crud's subtitle
small fix in behaviour publishable crud config
Merge pull request #140 from vrcAlbert/bugfix/twinnable_has_many

make the related item retrieve by fallback equivalent to the item retrieve by the main join
Bugfix behaviour Publishable

When we have a start date and a end date, published() didn't work.
Merge pull request #141 from GPascal/patch-1

Bugfix behaviour Publishable
Merge pull request #135 from vrcAlbert/bugfix/renderer_in_subtitle

Bugfix/renderer in subtitle
twinnable has_many : the unset on main relation mustn't be done as there is a "join on" condition on it.