User registration REST fully implemented.
Refactoring: object Dao's are only wired from Services from same kind of object, now if some obj functionality is needed, use Services
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/java/org/springframework/samples/webflow/rest/request/RESTRequestFactory.java
	src/main/java/org/springframework/samples/webflow/rest/request/RESTRequestGeneric.java
	src/main/java/org/springframework/samples/webflow/rest/request/concrete/RESTRequestLogin.java
	src/main/java/org/springframework/samples/webflow/user/User.java
	src/main/java/org/springframework/samples/webflow/user/session/UserSessionService.java