face: Incrementing Face counters

Change-Id: Ia1d7917bb52cf01ab2ff304638bc9f6cbdb2626f
Refs: #1178
diff --git a/daemon/face/face.hpp b/daemon/face/face.hpp
index 893a253..1efcb35 100644
--- a/daemon/face/face.hpp
+++ b/daemon/face/face.hpp
@@ -51,6 +51,12 @@
   /// fires when a Data is received
   EventEmitter<Data> onReceiveData;
 
+  /// fires when an Interest is sent out
+  EventEmitter<Interest> onSendInterest;
+
+  /// fires when a Data is sent out
+  EventEmitter<Data> onSendData;
+
   /// fires when face disconnects or fails to perform properly
   EventEmitter<std::string/*reason*/> onFail;