Updated GinUiBinder to work with GWT 2.5+

Added a case in CarStore to cover the feature.
Merge branch 'master' into cg_ginuibinder_update

Conflicts:
	gwtp-carstore/src/main/java/com/gwtplatform/carstore/Debug.gwt.xml
Simplification of the gwt.xml files
CR changes
Resolved compile build error and simplified GWT pom config
Modification to service exception to log the full exception on the server side and clear the cause before sending back to the client
Merge pull request #244 from ArcBees/cg_dispatcher_exception_logging

Better logging of Action exceptions on the server
Merge pull request #240 from ArcBees/cg_ginuibinder_update

GinUiBinder update for GWT 2.5