Major Description
Currently Wicket uses default Java serialization to persist/load the page to/from the backing stores.
There are serialization libraries which claim to be more performant than Java serialization.
With this ticket I want to make Wicket more configurable by introducing IPageSerializer interface with Java serialization as default implementation (as it works today).
Additionally I'll add an implementation based on http://code.google.com/p/kryo/ in wicketstuff project at Github.