Want to contribute? Great! First, read this page (including the small print at the end).
Before we can use your code, you must sign the Google Individual Contributor License Agreement (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.
You will find more details on Fork a Repo
If the branch is even or ahead of master, you can skip this part.
In the case the branch is behind master, please sync/rebase the branch with the master branch.
Add your contribution and make sure to use as less needed commits or to squash smaller commits.
Please make sure your changes are working as expect and add additional unit or general tests to the test directory if needed.
If everything works as expect, create a pull request for your forked branch. See: Creating a pull request
Depending on the change it could take up to 1 week before your change is merged into the master branch and part of the bundled application.
All submissions, including submissions by project members, require review. We use GitHub pull requests for this purpose.
Contributions made by corporations are covered by a different agreement than the one above, the Software Grant and Corporate Contributor License Agreement.