Simplifying CustomDirective example code.
Moved the example controller registration to Examples module.
Simplifying CustomFilter example.
Simplifying GwtWidgets.
Simplifying HttpClient.
Simplifying ImageResource example.
Simplifying OnClickEvent example.
Simplifying Preittfy example.
Simplifying Promise example.
Simplifying TextInput example.
Simplifying UrlHashParameter example.
Removed the remaining "Demo" monikers.