Allow multiple ShiroSecurityConstraints on a single page

Added ShiroSecurityConstraints annotation to allow multiple ShiroSecurityConstraint annotations on a single page. 

For example:
If some edit page is only allowed in case the user is Authenticated (remembered users will have to login again) 

@ShiroSecurityConstraints({
		@ShiroSecurityConstraint(constraint = ShiroConstraint.HasPermission, value = "editPermission"),
		@ShiroSecurityConstraint(constraint = ShiroConstraint.IsAuthenticated)}
)