Moved more graph tools into the graph_utils folder.

--HG--
rename : dlib/manifold_regularization/function_objects.h => dlib/graph_utils/function_objects.h
rename : dlib/manifold_regularization/function_objects_abstract.h => dlib/graph_utils/function_objects_abstract.h

dlib/graph_utils.h

@@ -5,6 +5,7 @@
 
 #include "graph_utils/graph_utils.h"
 #include "graph_utils/edge_list_graphs.h"
+#include "graph_utils/function_objects.h"
 
 #endif // DLIB_GRAPH_UTILs_H_ 
 

dlib/manifold_regularization.h

@@ -5,7 +5,7 @@
 
 #include "graph_utils/edge_list_graphs.h"
 #include "manifold_regularization/linear_manifold_regularizer.h"
-#include "manifold_regularization/function_objects.h"
+#include "graph_utils/function_objects.h"
 
 #endif // DLIB_MANIFOLD_REGULARIzATION_HEADER