License added

LICENSE

+Free use of this software is granted under the terms of the GNU
+General Public License (GPLv3).
+Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved.
+
+The source is available at: http://gitlab.vahanus.net/3ronco/ipturntables  
+Any help is appreciated, please feel free to report issues or contribute
+patches,
+
+Written by Branko Mikić <mikic@vahanus.net>
+Copyright (C) 2014, 2015, 2016 Branko Mikić.
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