added copyright header to inspector/tablemodel.h

inspector/tablemodel.h

@@ -1,3 +1,11 @@
+/*
+    Copyright (c) Arne Bersch
+    This file is part of Zöglfrex.
+    Zöglfrex is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+    Zöglfrex 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 General Public License along with Zöglfrex. If not, see <https://www.gnu.org/licenses/>.
+*/
+
 #ifndef TABLEMODEL_H
 #define TABLEMODEL_H