A few code reorganizations

Change-Id: If4632fecc7085e5448226c2061e08546757eda9b
diff --git a/core/conf/config.hpp b/core/conf/config.hpp
index 7bffe63..c515d70 100644
--- a/core/conf/config.hpp
+++ b/core/conf/config.hpp
@@ -24,7 +24,8 @@
 
 #include <boost/property_tree/ptree.hpp>
 
-namespace nsl {
+namespace ndn {
+namespace delorean {
 namespace conf {
 
 typedef boost::property_tree::ptree ConfigSection;
@@ -40,6 +41,7 @@
 };
 
 } // namespace conf
-} // namespace nsl
+} // namespace delorean
+} // namespace ndn
 
 #endif // NDN_DELOREAN_CONF_CONFIG_HPP