Caliburn.Light 1.4.0

• UIContext: add Initialize overload with more parameters
• Screen: Remove IHaveDisplayName (DisplayName property)
• Screen: Remove IChild (Parent property)
• DelegateCommand: replace Create by FromAction and FromFunc methods
• ParameterBinder: Remove context from CustomConverters
• Replace AttachedCollection<T> with ParameterCollection
• Remove IChild<TParent> and IParent<out T>