A few code reorganizations

Change-Id: If4632fecc7085e5448226c2061e08546757eda9b
diff --git a/core/logger.cpp b/core/logger.cpp
index 983a44d..8349f7b 100644
--- a/core/logger.cpp
+++ b/core/logger.cpp
@@ -23,7 +23,8 @@
 #include "tlv.hpp"
 #include "conf/config-file.hpp"
 
-namespace nsl {
+namespace ndn {
+namespace delorean {
 
 const int Logger::N_DATA_FETCHING_RETRIAL = 2;
 
@@ -302,4 +303,5 @@
 }
 
 
-} // namespace nsl
+} // namespace delorean
+} // namespace ndn