Fix public issue 82: Stop distributing benchmark data files that have

unclear or unsuitable licensing.

In general, we replace the files we can with liberally licensed data,
and remove all the others (in particular all the parts of the Canterbury
corpus that are not clearly in the public domain). The replacements
do not always have the exact same characteristics as the original ones,
but they are more than good enough to be useful for benchmarking.


git-svn-id: https://snappy.googlecode.com/svn/trunk@83 03e5f5b5-db94-4691-08a0-1a8bf15f6143

COPYING

@@ -26,3 +26,29 @@ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+===
+
+Some of the benchmark data in util/zippy/testdata is licensed differently:
+
+ - fireworks.jpeg is Copyright 2013 Steinar H. Gunderson, and
+   is licensed under the Creative Commons Attribution 3.0 license
+   (CC-BY-3.0). See https://creativecommons.org/licenses/by/3.0/
+   for more information.
+
+ - kppkn.gtb is taken from the Gaviota chess tablebase set, and
+   is licensed under the MIT License. See
+   https://sites.google.com/site/gaviotachessengine/Home/endgame-tablebases-1
+   for more information.
+
+ - paper-100k.pdf is an excerpt (bytes 92160 to 194560) from the paper
+   “Combinatorial Modeling of Chromatin Features Quantitatively Predicts DNA
+   Replication Timing in _Drosophila_” by Federico Comoglio and Renato Paro,
+   which is licensed under the CC-BY license. See
+   http://www.ploscompbiol.org/static/license for more ifnormation.
+
+ - alice29.txt, asyoulik.txt, plrabn12.txt and lcet10.txt are from Project
+   Gutenberg. The first three have expired copyrights and are in the public
+   domain; the latter does not have expired copyright, but is still in the
+   public domain according to the license information
+   (http://www.gutenberg.org/ebooks/53).