adding Log reference for Updaters

Source/Multiverso/include/multiverso/updater/momentum_updater.h

@@ -1,7 +1,8 @@
 #ifndef MULTIVERSO_UPDATER_MOMENTUM_UPDATER_H_
 #define MULTIVERSO_UPDATER_MOMENTUM_UPDATER_H_
 
-#include "updater.h"
+#include "multiverso/updater/updater.h"
+
 #include <vector>
 
 namespace multiverso {

Source/Multiverso/include/multiverso/updater/second_order_gradient_updater.h

@@ -1,10 +1,11 @@
 #ifndef MULTIVERSO_UPDATER_SECOND_ORDER_GRADIENT_UPDATER_H_
 #define MULTIVERSO_UPDATER_SECOND_ORDER_GRADIENT_UPDATER_H_
 
+#include "multiverso/updater/updater.h"
+
 #include <cmath>
 #include <vector>
 
-#include "updater.h"
 
 
 namespace multiverso {

Source/Multiverso/include/multiverso/updater/updater.h

@@ -1,9 +1,11 @@
 #ifndef MULTIVERSO_UPDATER_UPDATER_H_
 #define MULTIVERSO_UPDATER_UPDATER_H_
 
+#include <multiverso/multiverso.h>
+
 #include <cstring>
 #include <sstream>
-#include <multiverso/multiverso.h>
+#include <multiverso/util/log.h>
 
 namespace multiverso {