fw+doc: Renaming and extending limit extenstion

SimpleLimits now called PerOutFaceLimits.  Also, there is now
PerFibLimits that is inherited from PerOutFaceLimits and implements
additional check.

Also, this commit includes a couple of tricks to improve documentation
of templated classes (PerOutFaceLimits and PerFibLimits). Not ideal, but
much better than before.
diff --git a/model/fw/per-fib-limits.cc b/model/fw/per-fib-limits.cc
new file mode 100644
index 0000000..3b60cf5
--- /dev/null
+++ b/model/fw/per-fib-limits.cc
@@ -0,0 +1,68 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2012 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#include "per-fib-limits.h"
+#include "per-out-face-limits.h"
+
+#include "ns3/ndn-l3-protocol.h"
+#include "ns3/ndn-interest-header.h"
+#include "ns3/ndn-content-object-header.h"
+
+#include "best-route.h"
+#include "flooding.h"
+#include "smart-flooding.h"
+
+namespace ns3 {
+namespace ndn {
+namespace fw {
+
+template class PerFibLimits< PerOutFaceLimits<BestRoute> >;
+typedef PerFibLimits< PerOutFaceLimits<BestRoute> > PerFibLimitsPerOutFaceLimitsBestRoute;
+NS_OBJECT_ENSURE_REGISTERED (PerFibLimitsPerOutFaceLimitsBestRoute);
+
+template class PerFibLimits< PerOutFaceLimits<Flooding> >;
+typedef PerFibLimits< PerOutFaceLimits<Flooding> > PerFibLimitsPerOutFaceLimitsFlooding;
+NS_OBJECT_ENSURE_REGISTERED (PerFibLimitsPerOutFaceLimitsFlooding);
+
+template class PerFibLimits< PerOutFaceLimits<SmartFlooding> >;
+typedef PerFibLimits< PerOutFaceLimits<SmartFlooding> > PerFibLimitsPerOutFaceLimitsSmartFlooding;
+NS_OBJECT_ENSURE_REGISTERED (PerFibLimitsPerOutFaceLimitsSmartFlooding);
+
+#ifdef DOXYGEN
+// /**
+//  * \brief Strategy implementing per-fib-per-out-face limits on top of BestRoute strategy
+//  */
+class BestRoute::PerOutFaceLimits::PerFibLimits : public ::ns3::ndn::fw::PerFibLimits< ::ns3::ndn::fw::PerOutFaceLimits<BestRoute> > { };
+
+/**
+ * \brief Strategy implementing per-fib-per-out-face limits on top of Flooding strategy
+ */
+class Flooding::PerOutFaceLimits::PerFibLimits : public ::ns3::ndn::fw::PerFibLimits< ::ns3::ndn::fw::PerOutFaceLimits<Flooding> > { };
+
+/**
+ * \brief Strategy implementing per-fib-per-out-face limits on top of SmartFlooding strategy
+ */
+class SmartFlooding::PerOutFaceLimits::PerFibLimits : public ::ns3::ndn::fw::PerFibLimits< ::ns3::ndn::fw::PerOutFaceLimits<SmartFlooding> > { };
+
+#endif
+
+} // namespace fw
+} // namespace ndn
+} // namespace ns3