v3.4.2

Upgrading

No breaking or major changes, just three small fixes and a couple of minor changes.

Changes to behaviour

• Allow use of deletion callbacks for rollback events.
• Remove extra deletion code in the Populator - it's also being done by the real-time rake interface.

Bug fixes

• Real-time callback syntax for namespaced models accepts a string (as was already documented).
• Fix up logged warnings (and avoiding overwriting the existing warn method).
• Add missing search options to known values to avoid incorrect warnings.