refactor(kff.View): merge kff.BindingView subclass into kff.View - all views will become binding views (massive refactoring)
refactor(kff.Dom): remove redundant this.$element property
refactor(kff.View#nextNode): small performance optimization - caching nextNode and parentNode props
fix(kff.View): first bound view should have the collection view as its parent instead of collection view parent