Add license informations

README.rst

 Bind9 DNSSEC keys management
 ############################
 
+|licence| |codacy|
+
 Since version 9.7, BIND9 added support for auto-dnssec. After initial configuration,
 servers using auto-dnssec will automatically sign and re-sign zones at the appropriate time as
 determined by key metadata. However, keys generation and rotation planning is left to the
@@ -284,3 +286,10 @@ scheduling KSK rotation, but you can skip the tests with the ``--no-check`` opti
 Beware that with the ``--no-check`` keys will be rotate whether the DS are published in the
 parent zone or not. Use it very carefully.
 
+
+
+.. |licence| image:: https://badges.genua.fr/github/license/nitmir/bind-dnssec.svg
+    :target: https://www.gnu.org/licenses/gpl-3.0.html
+
+.. |codacy| image:: https://badges.genua.fr/codacy/grade/a262f8980c514d85951f89f4e7b47916/master.svg
+    :target: https://app.codacy.com/app/valentin-samir/bind-dnssec
\ No newline at end of file

dnssec_keys_management.py

 #!/usr/bin/env python3
 # -*- coding: utf8 -*-
+# 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 version 3 for
+# more details.
+#
+# You should have received a copy of the GNU General Public License version 3
+# along with this program; if not, write to the Free Software Foundation, Inc., 51
+# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# (c) 2015-2018 Valentin Samir
+# (c) 2017 Hamza Dely
+#
 # pylint: disable=locally-disabled,invalid-name
 """The script allow to manage bind dnssec keys (generate new keys and handle key rollover)."""
 import os