gui: AbstractWComponent: renamed "listener" to "dataChangedProvider"
gui: WCheckBox: change constructor param from "boolean" to "Boolean"
gui: WForm: Add proxy to pass data changed events to upper layers
gui: formfactory: some fixes to display enum values in a combobox
gui: misc: set encoding of test/resources to utf-8 in eclipse settings
gui: misc: add logback config for test classes
gui: test: added new demos
gui: widgets: minor style fixes for better display