#63: Added value destructor to JW.Functor configuration.
#63: Fixed bugs in documentation.
#63: Added JW.Mapper.
#63: Improved JW.Mapper chaining.
#63: Added capability to return JW.Property as result of renderChildId method.
#80: Added multiple properties support in Switcher. Added acceptNull option. Removed tracker value.
#77: Documented JW.makeRegistry.
#63: Added renderRoot method for JW.UI.Component.
#80: Various adjustments. Added JW.UI.VisibleUpdater. Added refiltering methods to JW.AbstractArray.Filterer. Added scope argument to JW.Timeout and JW.Interval. Added JW.UI.hash property. Fixed minor bugs.