Added info on CLA (firebase#18)

hiranya911 · web-flow · commit 1941d40f968e · 2017-04-24T17:16:01.000-07:00
diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
@@ -58,12 +58,30 @@ Most non-trivial changes should include some extra test coverage. If you aren't
 tests, feel free to submit regardless and ask us for some advice.
 
 Finally, you will need to sign our
-[Contributor License Agreement](https://cla.developers.google.com/about/google-individual)
-before we can accept your pull request.
+[Contributor License Agreement](https://cla.developers.google.com/about/google-individual),
+and go through our code review process before we can accept your pull request.
 
+### Contributor License Agreement
 
-## <a name="local-setup"></a>Need to get set up locally?
+Contributions to this project must be accompanied by a Contributor License
+Agreement. You (or your employer) retain the copyright to your contribution.
+This simply gives us permission to use and redistribute your contributions as
+part of the project. Head over to <https://cla.developers.google.com/> to see
+your current agreements on file or to sign a new one.
+
+You generally only need to submit a CLA once, so if you've already submitted one
+(even if it was for a different project), you probably don't need to do it
+again.
+
+### Code reviews
 
+All submissions, including submissions by project members, require review. We
+use GitHub pull requests for this purpose. Consult
+[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
+information on using pull requests.
+
+
+## <a name="local-setup"></a>Need to get set up locally?
 
 ### Initial Setup
 
