playground: updating the CONTRIBUTORS file

The CONTRIBUTORS file is no longer needed for the submission
automation, but it is still required as per the open source
requirements. This CL updates the CONTRIBUTORS file header and
populates its content with the current list of contributors.

MultiPart: 8/9
Change-Id: I62a91d75d62631c19c356ed4d515d3c475d40b47
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index e9c7bdb..a3bd0e8 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -1,32 +1,30 @@
-# This is the official list of people who can contribute
-# (and typically have contributed) code to the Vanadium repository.
+# 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
+# lists people.  For example, Google employees are listed here
 # but not in AUTHORS, because Google holds the copyright.
 #
-# The submission process automatically checks to make sure
-# that people submitting code are listed in this file (by email address).
+# https://developers.google.com/open-source/cla/individual
+# https://developers.google.com/open-source/cla/corporate
 #
-# 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:
-#
-#     http://code.google.com/legal/individual-cla-v1.0.html
-#     http://code.google.com/legal/corporate-cla-v1.0.html
-#
-# 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 like so:
+# Names should be added to this file as:
 #     Name <email address>
-#
-# An entry with two email addresses specifies that the
-# first address should be used in the submit logs and
-# that the second address should be recognized as the
-# same person when interacting with Rietveld.
-
-# Please keep the list sorted.
+Adam Sadovsky <sadovsky@google.com>
+Alex Fandrianto <alexfandrianto@google.com>
+Ali Ghassemi <aghassemi@google.com>
+Ankur Taly <ataly@google.com>
+Asim Shankar <ashankar@google.com>
+Benjamin Prosnitz <bprosnitz@google.com>
+Bogdan Caprita <caprita@google.com>
+Cosmos Nicolaou <cnicolaou@google.com>
+Ivan Pilat <ivanpi@google.com>
+Jason Campbell <jasoncampbell@google.com>
+Jeffrey Regan <jregan@google.com>
+Jing Jin <jingjin@google.com>
+Jiri Simsa <jsimsa@google.com>
+Matt Rosencrantz <mattr@google.com>
+Nicolas LaCasse <nlacasse@google.com>
+Robin Thellend <rthellend@google.com>
+Ryan Brown <ribrdb@google.com>
+Shyam Jayaraman <bjornick@google.com>
+Suharsh Sivakumar <suharshs@google.com>
+Todd Wang <toddw@google.com>