How to contribute
-----------------
Contributions to this project are welcome, especially changes that improve
portability without reducing readability.

Contributor License Agreement
-----------------------------
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.  Visit 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
        https://help.github.com/articles/about-pull-requests/
for more information on using pull requests.