Don't allow working copies within working copies
Also disallow checking out items contained within working copies
Created a test simulating the usecase described in https://dev.plone.org/ticket/13462
A fix for the problem described in https://dev.plone.org/ticket/13462
Merge pull request #5 from plone/ticket-13462

Ticket 13462
Handle references recursively
Preparing release 2.1.10
Back to development: 2.1.11
fixed test case for ticket #13462
Merge pull request #6 from plone/ticket-13462

fixed test case for ticket #13462
fix test
avoid adding a runTest method to FunctionalTestCase
Replace deprecated test assert statements.
Preparing release 2.1.11
Back to development: 2.1.12
Replaced the "Locked" label with "Warning"
Merge pull request #8 from rristow/master

Replaced the "Locked" label with "Warning"
Information messages can be hidden from user who checked out content when using a placeful workflow, see: https://dev.plone.org/ticket/13852
Make iterate permissions Zope3 permissions so check in action can require check in permission instead of cmf.modifyportalcontent.
Use the check in icon for the check in action.