Transition to jWidget SDK 0.5.
#57: Added JW.Property and its synchronizers.
#54: Added object ownage engine.
#54: Updated copyright date.
#54: Added missing license headers.
#54: Documentation.
#54: Documented JW.Property and JW.Copier.
#54: Documented JW.Functor.
#54: Documented JW.Updater.
#54: Added JW.Switcher. Documented JW.UI.AttrUpdater.
#54: Documented JW.UI updaters and listeners.
#54: Documentation fixes.
#54: Tested JW.Property.
#54: Tested JW.Class.own.
#54: Tested JW.Proxy. Fixed bug.
#54: Tested JW.AbstractCollection.ownItems.
#54: Tested JW.Copier.
#54: Tested JW.Updater. Fixed bug.
#54: Tested JW.Updater. Fixed bug.
#54: Tested JW.Functor.