Add copyright and license statement to Dockerfile.

Author: eeide

Dockerfile

@@ -1,4 +1,15 @@
+##
+## Copyright (c) 2015 Tamir Duberstein
+## All rights reserved.
+##
+## This file is distributed under the University of Illinois Open Source
+## License.  See the file COPYING for details.
+##
+
+###############################################################################
+
 # Travis-CI is still on Precise: https://github.com/travis-ci/travis-ci/issues/2046
+
 FROM ubuntu:precise
 
 ENV CREDUCE /creduce