Add license header

circle/common/pagination.py

+# Copyright 2017 Budapest University of Technology and Economics (BME IK)
+#
+# This file is part of CIRCLE Cloud.
+#
+# CIRCLE 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.
+#
+# CIRCLE 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 CIRCLE.  If not, see <http://www.gnu.org/licenses/>.
 from rest_framework.pagination import PageNumberPagination, _positive_int
 from rest_framework.utils.urls import remove_query_param, replace_query_param