Fix #1567 and add tests to cover getChildView taking a model
Merge pull request #1619 from cmaher/fix-1566

Fix #1567 and add tests to cover getChildView taking a model
Rename CompositeView _renderRoot to _renderTemplate
add hasView property to region
Merge pull request #1646 from ahumphreys87/hasViewOnRegion

add hasView property to region
Refactor buildRegion to simplify building from different regionConfig types