#511 : Add security to stats page
Use @DefaultGateKeeper and @NoGateKeeper instead of setting one for each presenter
Merge branch 'jcl_carstore_stats_unsecure' into jcl_carstore_login_redirect

Conflicts:
	gwtp-carstore/src/main/java/com/gwtplatform/carstore/client/application/cars/CarsPresenter.java
	gwtp-carstore/src/main/java/com/gwtplatform/carstore/client/application/login/LoginPresenter.java
	gwtp-carstore/src/main/java/com/gwtplatform/carstore/client/application/manufacturer/ManufacturerDetailPresenter.java
	gwtp-carstore/src/main/java/com/gwtplatform/carstore/client/application/manufacturer/ManufacturerPresenter.java
	gwtp-carstore/src/main/java/com/gwtplatform/carstore/client/application/rating/RatingDetailPresenter.java
	gwtp-carstore/src/main/java/com/gwtplatform/carstore/client/application/rating/RatingPresenter.java
	gwtp-carstore/src/main/java/com/gwtplatform/carstore/client/application/report/ReportPresenter.java