Added helper function to GXS services to access token management and data store

git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-gxs-b1@5680 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/services/p3photoserviceV2.h

@@ -43,6 +43,11 @@ public:
      */
     bool updated();
 
+    /*!
+     *
+     */
+    void service_tick();
+
 protected:
 
     void notifyChanges(std::vector<RsGxsNotify*>& changes);