add common hearder file.

Former-commit-id: 1df2db08a029cd70872a2f3ef9c1ff45da431299

src/gadgetsmp.h

+/*******************************************************************************
+ * This file is part of GadgetSMP.
+ * Coypright (c) 2012 Pedro Gonnet (pedro.gonnet@durham.ac.uk)
+ * 
+ * This program 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.
+ * 
+ * This program 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 Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ ******************************************************************************/
+
+/* Config parameters. */
+#include "../config.h"
+
+/* Local headers. */
+#include "cycle.h"
+#include "lock.h"
+#include "task.h"
+#include "part.h"
+#include "cell.h"
+#include "space.h"
+#include "queue.h"
+#include "runner.h"
+