Merge pull request wannier-developers#102 from AntimoMarrazzo/GW

Update k_mapper.py

utility/k_mapper.py

@@ -1,5 +1,16 @@
 #! /usr/bin/env python
 #
+# This file is distributed as part of the Wannier90 code and
+# under the terms of the GNU General Public License. See the
+# file `LICENSE' in the root directory of the Wannier90
+# distribution, or http://www.gnu.org/copyleft/gpl.txt
+#
+# The webpage of the Wannier90 code is www.wannier.org
+#
+# The Wannier90 code is hosted on GitHub:
+#
+# https://github.com/wannier-developers/wannier90
+#
 # Python2 script to find the indeces of a coarse mesh into a finer mesh
 # provided they are commensurate.
 #