Update notes for submitted changes

* Require gear 0.4.0
Update notes for submitted changes

* Use the 'resolve' merge strategy by default
Update notes for submitted changes

* Fetch specific refs on ref-updated events
Update notes for submitted changes

* Don't reset the local repo
Update notes for submitted changes

* Fix graceful exit
Update notes for submitted changes

* Report item stats when removing a change
Update notes for submitted changes

* Set merge result correctly on exceptions