Start replacing basic list for uuids with a persistentdict
Fix UI for handling the new Data structure and also fix the URL when the added object is an image and needs /view at the end
Allow including elements with no images
Left note in file for testing custom URL functionality once tests are fixed
Update changelog and include upgrade step
Fix tests and add an upgrade test
We don't really need to inherit from DictMultiConverter, so we don't need to upgrade to newer z3c.form package
Add docstrings to methods and also more tests
Merge branch 'master' of github.com:collective/collective.cover

Conflicts:
	CHANGES.rst
Reindex created objects
Bring back functionality of not including objects with no images. 8df37e04d7299a0cb1a90e9f0a8ace746859c49c
Fix tests related to Carousel and add new ones for testing Custom URL functionality
Add the Expected Failure back because Travis is still randomly failing
Merge branch 'master' of github.com:collective/collective.cover

Conflicts:
	CHANGES.rst
	src/collective/cover/tests/test_upgrades.py
Merge pull request #451 from enfold/master

Allow to choose a custom URL for elements in a Carousel/List