diff --git a/CONTRIBUTING b/CONTRIBUTING
new file mode 100644
index 0000000..2827b7d
--- /dev/null
+++ b/CONTRIBUTING
@@ -0,0 +1,27 @@
+Want to contribute? Great! First, read this page (including the small print at the end).
+
+### Before you contribute
+Before we can use your code, you must sign the
+[Google Individual Contributor License Agreement]
+(https://cla.developers.google.com/about/google-individual)
+(CLA), which you can do online. The CLA is necessary mainly because you own the
+copyright to your changes, even after your contribution becomes part of our
+codebase, so we need your permission to use and distribute your code. We also
+need to be sure of various other things—for instance that you'll tell us if you
+know that your code infringes on other people's patents. You don't have to sign
+the CLA until after you've submitted your code for review and a member has
+approved it, but you must do it before we can put your code into our codebase.
+Before you start working on a larger contribution, you should get in touch with
+us first through the issue tracker with your idea so that we can help out and
+possibly guide you. Coordinating up front makes it much easier to avoid
+frustration later on.
+
+### Code reviews
+All submissions, including submissions by project members, require review. We
+use Github pull requests for this purpose.
+
+### The small print
+Contributions made by corporations are covered by a different agreement than
+the one above, the
+[Software Grant and Corporate Contributor License Agreement]
+(https://cla.developers.google.com/about/google-corporate).
diff --git a/README.md b/README.md
index c7a13a9..e068225 100644
--- a/README.md
+++ b/README.md
@@ -9,30 +9,34 @@ Library for converting V3 API request to v4 API requests.
 
 ## Typical usage example
 
-There are two methods of using the gav4 libary. The first being you can
-`apply` the library to an authorized Google Analytics Service object, which
-exposes a get method that operates much like the current v3 Core Reporting
-API. Alternatively you can call the conversion methods directly.
+There are two methods of using the gav4 library. You can `apply` the library to an authorized Google Analytics Service object, which exposes a get method that operates much like the current Core Reporting API V3.
 
 
-    from gcloud import datastore
     import gav4
+
     gav4.apply_gav4(analytics)
 
+    # Call the gav4_get method with a V3 request and get a V3 response.
     v3_response = analytics.gav4_get(v3_request).execute()
 
-    # Alternatively you can convert the request directly
+
+Alternatively you can convert the requests and responses directly.
+
+
+    # Convert a V3 request into a V4 request.
     v4_request = gav4.convert_request(v3_request)
 
+    # Call the V4 API.
     v4_response = analytics.reports().batchGet(body=v4_request).execute()
 
+    # Convert the V4 API response into a V3 response.
     v3_response = gav4.convert_report(v4_response.get('reports', [])[0])
 
 
 ## Contributing
 
 1. **Please sign one of the contributor license agreements below.**
-2. Fork the repo, develop and test your code changes, add docs.
+2. Fork the repository, develop and test your code changes, add docs.
 3. Make sure that your commit messages clearly describe the changes.
 4. Send a pull request.
 
diff --git a/setup.py b/setup.py
index 5dc945c..4e33856 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,17 @@
 #!/usr/bin/env python
+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# 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.
 
 import os