Add an optional delegate to get informed about new update being available

Classes/BITStoreUpdateManager.h

@@ -37,6 +37,8 @@ typedef enum {
   BITStoreUpdateCheckManually = 2
 } BITStoreUpdateSetting;
 
+@protocol BITStoreUpdateManagerDelegate;
+
 /**
  The store update manager module.
  
@@ -53,6 +55,16 @@ typedef enum {
 @interface BITStoreUpdateManager : BITHockeyBaseManager <UIAlertViewDelegate>
 
 
+///-----------------------------------------------------------------------------
+/// @name Delegate
+///-----------------------------------------------------------------------------
+
+/**
+ Sets the optional `BITStoreUpdateManagerDelegate` delegate.
+ */
+@property (nonatomic, weak) id delegate;
+
+
 ///-----------------------------------------------------------------------------
 /// @name Update Checking
 ///-----------------------------------------------------------------------------