Add AUTHORS and CONTRIBUTORS files.

AUTHORS

+# This is the official list of benchmark authors for copyright purposes.
+# This file is distinct from the CONTRIBUTORS files.
+# See the latter for an explanation.
+#
+# Names should be added to this file as:
+#	Name or Organization <email address>
+# The email address is not required for organizations.
+#
+# Please keep the list sorted.
+
+David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
+Eugene Zhuk <eugene.zhuk@gmail.com>
+Google Inc.
+Oleksandr Sochka <sasha.sochka@gmail.com>

CONTRIBUTORS

+# People who have agreed to one of the CLAs and can contribute patches.
+# The AUTHORS file lists the copyright holders; this file
+# lists people.  For example, Google employees are listed here
+# but not in AUTHORS, because Google holds the copyright.
+#
+# Names should be added to this file only after verifying that
+# the individual or the individual's organization has agreed to
+# the appropriate Contributor License Agreement, found here:
+#
+# https://developers.google.com/open-source/cla/individual
+# https://developers.google.com/open-source/cla/corporate
+#
+# The agreement for individuals can be filled out on the web.
+#
+# When adding J Random Contributor's name to this file,
+# either J's name or J's organization's name should be
+# added to the AUTHORS file, depending on whether the
+# individual or corporate CLA was used.
+#
+# Names should be added to this file as:
+#     Name <email address>
+#
+# Please keep the list sorted.
+
+David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
+Dominic Hamon <dominic@google.com>
+Eugene Zhuk <eugene.zhuk@gmail.com>
+Oleksandr Sochka <sasha.sochka@gmail.com>
+Pierre Phaneuf <pphaneuf@google.com>