add a license

COPYING

@@ -0,0 +1,14 @@
+Authors dedicate this work to public domain, for the benefit of the
+public at large and to the detriment of the authors' heirs and
+successors. Authors intends this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights under
+copyright law, whether vested or contingent, in the work. Authors
+understands that such relinquishment of all rights includes the
+relinquishment of all rights to enforce (by lawsuit or otherwise)
+those copyrights in the work.
+
+Authors recognize that, once placed in the public domain, the work
+may be freely reproduced, distributed, transmitted, used, modified,
+built upon, or otherwise exploited by anyone for any purpose,
+commercial or non-commercial, and in any way, including by methods
+that have not yet been invented or conceived.