Checkpoint.  Some changes in forwarding strategy API

Removing WillSendOutInterest and adding TrySendOutInterests, which
should be fully defined in child classes (or fully used from parent, but
not combined).
diff --git a/model/fw/stats-based-randomized-interest-accept.h b/model/fw/stats-based-randomized-interest-accept.h
index 7ce0e9c..4fb833e 100644
--- a/model/fw/stats-based-randomized-interest-accept.h
+++ b/model/fw/stats-based-randomized-interest-accept.h
@@ -59,9 +59,11 @@
 
 protected:
   virtual bool
-  WillSendOutInterest (Ptr<Face> outFace,
-                       Ptr<const InterestHeader> header,
-                       Ptr<pit::Entry> pitEntry);
+  TrySendOutInterest (Ptr<Face> inFace,
+                      Ptr<Face> outFace,
+                      Ptr<const InterestHeader> header,
+                      Ptr<const Packet> origPacket,
+                      Ptr<pit::Entry> pitEntry);
   
   virtual void
   WillSatisfyPendingInterest (Ptr<Face> inFace,