Make use of logger provided by ndn-cxx

This commit also introduces a basic implmentation of DummyForwarder to
remove dependency on (and uncertainty of) the running instance of NFD.

Change-Id: Iba9fcbf3d3ebb1a5ae47018ad3be5d7d2b9c7462
diff --git a/src/file-state.cpp b/src/file-state.cpp
index 42e40de..33a4384 100644
--- a/src/file-state.cpp
+++ b/src/file-state.cpp
@@ -22,7 +22,7 @@
 #include "logging.h"
 #include <boost/bind.hpp>
 
-INIT_LOGGER("FileState")
+_LOG_INIT(FileState);
 
 using namespace boost;
 using namespace std;