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/server/server.cpp b/server/server.cpp
index 46c983a..f52b448 100644
--- a/server/server.cpp
+++ b/server/server.cpp
@@ -37,7 +37,7 @@
 
 using namespace ndn::chronoshare;
 
-INIT_LOGGER("HttpServer")
+_LOG_INIT(HttpServer);
 
 server::server(const std::string& address, const std::string& port, const std::string& doc_root)
   : io_service_()