src: Reorganizing source code in preparation to merge NRD code

Note that as of this commit, there are several changes in location of
compiled binaries in `build/` folder:

* `nfd` has been moved to `build/bin/nfd`
* `unit-tests` has been split into `unit-tests-core` and `unit-tests-daemon`

Change-Id: I2c830c117879edbaa5457d6423c13f0273285919
Refs: #1486
diff --git a/tools/nfd-autoreg.cpp b/tools/nfd-autoreg.cpp
index 3273b50..f9e8059 100644
--- a/tools/nfd-autoreg.cpp
+++ b/tools/nfd-autoreg.cpp
@@ -32,7 +32,7 @@
 #include <boost/program_options/variables_map.hpp>
 #include <boost/program_options/parsers.hpp>
 
-#include "daemon/core/face-uri.hpp"
+#include "core/face-uri.hpp"
 #include "network.hpp"
 
 namespace po = boost::program_options;