Use modern C++ comment style for headers.

src/dgraph/import.cpp

-/*
- * Copyright 2010,
- * François Bleibel,
- * Olivier Stasse,
- *
- * CNRS/AIST
- *
- * This file is part of sot-core.
- * sot-core is free software: you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public License
- * as published by the Free Software Foundation, either version 3 of
- * the License, or (at your option) any later version.
- * sot-core is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.  You should
- * have received a copy of the GNU Lesser General Public License along
- * with sot-core.  If not, see <http://www.gnu.org/licenses/>.
- */
+// Copyright 2010, François Bleibel, Thomas Moulard, Olivier Stasse,
+// JRL, CNRS/AIST.
+//
+// This file is part of dynamic-graph.
+// dynamic-graph is free software: you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public License
+// as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// dynamic-graph is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Lesser Public License for more details.  You should have
+// received a copy of the GNU Lesser General Public License along with
+// dynamic-graph. If not, see <http://www.gnu.org/licenses/>.
 
 #include <cassert>