all: cleanup common.hpp and import typenames from ndn namespace.

This allows us to compile NFD in C++11 mode, making use of std::shared_ptr,
std::function, std::bind, etc. rather than their boost equivalents
(provided that ndn-cpp-dev is also compiled in C++11 mode). This is an
experimental feature and may not work properly.

Change-Id: I310529f78e1e428a8530b087983130d1ef3a9d88
diff --git a/daemon/mgmt/config-file.cpp b/daemon/mgmt/config-file.cpp
index 4af6f91..3be86c9 100644
--- a/daemon/mgmt/config-file.cpp
+++ b/daemon/mgmt/config-file.cpp
@@ -26,6 +26,7 @@
 #include "core/logger.hpp"
 
 #include <boost/property_tree/info_parser.hpp>
+#include <fstream>
 
 namespace nfd {
 
@@ -33,7 +34,6 @@
 
 ConfigFile::ConfigFile()
 {
-
 }
 
 void