Support for one collection with many views

Refactoring the collection binding view item constructor reference to look to the bound view rather than the bound collection. A bound collection no longer specifies any view relationship (the collection view property has been deprecated). The bound view should specify an itemView property with a view constructor for collection items. The legacy API will continue working in this release, but may be officially deprecated in the future.

Thanks @sdemjanenko for pressing this glaring backwards relationship until it was fixed!