Tighten up API to disallow creation of duplicate labels
 within a resource's version history.

Resolves: https://www.pivotaltracker.com/story/show/83133872
Cleaned up display of historic versions.
Exclude spaces from auto-generated version labels

Follow-on to: https://www.pivotaltracker.com/story/show/83133872
Merge pull request #666 from mikedurbin/version-display-cleanup

Cleaned up display of historic versions.

Resolves: https://www.pivotaltracker.com/story/show/83134448
Add namespaceRegistry lookups for property prefixes before sending events to the JMS eventbus

Resolves: https://www.pivotaltracker.com/story/show/82135176