bump xml versions to 452
Make URLs lockable so they can be updated over the REST API.
Merge pull request #1655 from bendiy/kh

Make URLs lockable so they can be updated over the REST API.
Merge pull request #1651 from gpazo/bumpxml452

bump xml versions to 452
Comment Correction.
Merge pull request #1661 from bendiy/kh

Comment Correction.