add contributors and contributing information

AUTHORS

@@ -0,0 +1,9 @@
+# This is the official list of js-rich-marker 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.
+
+Google Inc.

CONTRIBUTORS

@@ -0,0 +1,13 @@
+# 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.
+#
+# https://developers.google.com/open-source/cla/individual
+# https://developers.google.com/open-source/cla/corporate
+#
+# Names should be added to this file as:
+#     Name <email address>
+
+Luke Mahé <lukem@google.com>
+Brendan Kenny <bckenny@google.com>

README.md

@@ -28,3 +28,32 @@ distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
+
+Contributing
+=================
+
+Want to help out? That's awesome!
+
+The library is open source and lives on GitHub at:
+https://github.com/googlemaps/js-rich-marker
+Open an issue or fork the library and submit a pull request.
+
+Keep in mind that before we can accept any pull requests we have to jump
+through a couple of legal hurdles, primarily a Contributor License Agreement
+(CLA):
+
+- **If you are an individual writing original source code**
+  and you're sure you own the intellectual property,
+  then you'll need to sign an
+  [individual CLA](https://developers.google.com/open-source/cla/individual).
+- **If you work for a company that wants to allow you to contribute your work**,
+  then you'll need to sign a
+  [corporate CLA](https://developers.google.com/open-source/cla/corporate)
+
+Follow either of the two links above to access the appropriate CLA and
+instructions for how to sign and return it.
+
+When preparing your code, make sure to update the AUTHORS and CONTRIBUTORS file
+to reflect your contribtion.
+
+Once we receive your CLA, we'll be able to review and accept your pull requests.