Relax the RegEx restrictions to allow the new ICAAN TLDs.
Allow atomic update for the entire `DictField`
Merge remote-tracking branch 'upstream/master'
Adding changelog entry.
Merge pull request #742 from bocribbz/dictfield-atomic-update

Allow atomic update for the entire `DictField`
Update changelog.rst
Fix conflict for merge PR #726
Merge branch 'jshirley-master'