SubviewCollection.prototype.intialize() hook for constructor fn
Options for silently adding and removing lookup items
Lookup items added on initialisation should be added silently
Fixed bug in ViewCollection constructor (silent adding should be applied on initialisation, not for model 'add' events)
Fix ViewCollectionGroup render behaviour
Merge branch 'feature/issue-323-lookup-needs-options-for-silently-adding-and-removing-items' into develop-frontend
Merge branch 'feature/issue-322-subviewcollection-needs-an-initialize-hook' into develop-frontend