let authenticator set the description of the viewController

Classes/BITAuthenticationViewController.h

@@ -47,6 +47,12 @@
  */
 @property (nonatomic, assign) BOOL showsLoginViaWebButton;
 
+/**
+ *  Description shown on top of view. Should tell why this view 
+ *  was presented and what's next.
+ */
+@property (nonatomic, copy) NSString* tableViewTitle;
+
 /**
  *	can be set to YES to also require the users password
  *