Moving around path weight tagging. Now CcnxFace owns metric field, which is used for tagging.

Correcting bugs in blackhole-sprint scenario.  This time it should be
the right one:
- instead of a hijacker app, all faces on hijacked node are turned down
- there was a trick with RTT estimation (when batch, it is necessary to
  reset history upon a new batch)
- instead of random runs, trying all possible combinations of
  producer/hijacker
diff --git a/model/annotated-topology-reader.h b/model/annotated-topology-reader.h
index 6edcb34..91e6d26 100644
--- a/model/annotated-topology-reader.h
+++ b/model/annotated-topology-reader.h
@@ -80,12 +80,28 @@
   void
   AssignIpv4Addresses (Ipv4Address base);
 
+  /**
+   * \brief Set bounding box where nodes will be randomly places (if positions are unspecified)
+   * \param ulx Upper left x coordinate
+   * \param uly Upper left y coordinate
+   * \param lrx Lower right x coordinate
+   * \param lry Lower right y coordinate
+   */
   void
   SetBoundingBox (double ulx, double uly, double lrx, double lry);
 
+  /**
+   * \brief Set mobility model to be used on nodes
+   * \param model class name of the model
+   */
   void
   SetMobilityModel (const std::string &model);
 
+  /**
+   * \brief Apply OSPF metric on Ipv4 (if exists) and Ccnx (if exists) stacks
+   */
+  void ApplyOspfMetric ();
+
 protected:
   Ptr<Node>
   CreateNode (const std::string name);
@@ -100,7 +116,6 @@
    * NodeContainer from Read method
    */
   void ApplySettings ();
-  void ApplyOspfMetric ();
     
 protected:
   std::string m_path;