#32: Added TDD tests.
#32: Added TDD tests.
#32: Added TDD tests.
#32: Added JW.isNotSet, JW.isNotNull, JW.isNotBlank, JW.get, JW.set, JW.destroy, JW.UI.preventDefault.
#32: Added JW.ItemEventParams.
#32: Added JW.UI.Component.setElement.