A convenience subclass of wicket's WebApplication which adds the hooks
necessary to use JSR-299 injections in wicket components, as well as manage
JSR-299 conversation scopes with Wicket page metadata.
SeamRequestCycle is a subclass of the standard wicket WebRequestCycle which:
restores long-running conversations specified in wicket page metadata
when a page target is first used.
SeamWebRequestCycleProcessor is a subclass of the standard wicket
WebRequestCycleProcessor which saves the conversation id of any long-running
conversation in wicket page metadata.