One more big change: prototypes of most of the forwarding strategy functions has been changed

InterestHeader now constant everywhere and only smart pointer is used, instead of passing some parameters by
reference to the smart pointer (doesn't really make sense).

Another big change that is not fully visible for now: PIT entry now
stores the whole pointer to InterestHeader, which can be used with
delayed Interest processing procedures (previously, only Name was
stored, which is really a big simplification of PIT).
diff --git a/model/pit/ndn-pit-entry.cc b/model/pit/ndn-pit-entry.cc
index 765693f..95b81dd 100644
--- a/model/pit/ndn-pit-entry.cc
+++ b/model/pit/ndn-pit-entry.cc
@@ -42,16 +42,22 @@
               Ptr<const InterestHeader> header,
               Ptr<fib::Entry> fibEntry)
   : m_container (container)
-  , m_prefix (header->GetNamePtr ())
+  , m_interest (header)
   , m_fibEntry (fibEntry)
   , m_expireTime (Simulator::Now () + (!header->GetInterestLifetime ().IsZero ()?
                                        header->GetInterestLifetime ():
                                        Seconds (1.0)))
   , m_maxRetxCount (0)
 {
+  NS_LOG_FUNCTION (GetPrefix () << m_expireTime);
   // note that if interest lifetime is not set, the behavior is undefined
 }
 
+Entry::~Entry ()
+{
+  NS_LOG_FUNCTION (GetPrefix ());
+}
+
 void
 Entry::UpdateLifetime (const Time &offsetTime)
 {
@@ -64,6 +70,31 @@
   NS_LOG_INFO ("Updated lifetime to " << m_expireTime.ToDouble (Time::S));
 }
 
+const NameComponents &
+Entry::GetPrefix () const
+{
+  return m_interest->GetName ();
+}
+
+const Time &
+Entry::GetExpireTime () const
+{
+  return m_expireTime;
+}
+
+bool
+Entry::IsNonceSeen (uint32_t nonce) const
+{
+  return m_seenNonces.find (nonce) != m_seenNonces.end ();
+}
+
+void
+Entry::AddSeenNonce (uint32_t nonce)
+{
+  m_seenNonces.insert (nonce);
+}
+
+
 Entry::in_iterator
 Entry::AddIncoming (Ptr<Face> face)
 {
@@ -81,6 +112,11 @@
   m_incoming.erase (face);
 }
 
+void
+Entry::ClearIncoming ()
+{
+  m_incoming.clear ();
+}
 
 Entry::out_iterator
 Entry::AddOutgoing (Ptr<Face> face)
@@ -99,6 +135,12 @@
 }
 
 void
+Entry::ClearOutgoing ()
+{
+  m_outgoing.clear ();
+}
+
+void
 Entry::RemoveAllReferencesToFace (Ptr<Face> face)
 {
   in_iterator incoming = m_incoming.find (face);
@@ -175,9 +217,34 @@
     }
 }
 
+Ptr<fib::Entry>
+Entry::GetFibEntry ()
+{
+  return m_fibEntry;
+};
+
+const Entry::in_container &
+Entry::GetIncoming () const
+{
+  return m_incoming;
+}
+
+const Entry::out_container &
+Entry::GetOutgoing () const
+{
+  return m_outgoing;
+}
+
+uint32_t
+Entry::GetMaxRetxCount () const
+{
+  return m_maxRetxCount;
+}
+
+
 std::ostream& operator<< (std::ostream& os, const Entry &entry)
 {
-  os << "Prefix: " << *entry.m_prefix << "\n";
+  os << "Prefix: " << entry.GetPrefix () << "\n";
   os << "In: ";
   bool first = true;
   BOOST_FOREACH (const IncomingFace &face, entry.m_incoming)