Add title and "show more..." options to the list tile.
Fix list tile tests.

The tile is editable now.
Add test for editing list tile.
Add upgrade step to cook css resources.
Prepare upgrade step to cook javascript resources.

This is not needed at the moment, but surely in the future.
Fix link for more search results in more_link widget.

This is the link that loads more results from the search query
when selecting an item.
Fix upgrade tests.
Update changelog
Merge branch 'master' into list-tile-show-more

Conflicts:
	CHANGES.rst
Fix changelog
Merge pull request #389 from collective/list-tile-show-more

Add title and 'show more' to the List tile