Update README.md

[timsgardner]

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[nasser]

Thank you for your submission! Before we merge it in, we would like you to read and agree to our Contributor License Agreement. Our CLA is based on GitHub's and basically confirms that:

1. Anyone can use your contributions anywhere, for free, forever.
2. Your contributions do not infringe on anyone else's rights.
3. You retain ownership of your contribution.

Once you've read it, comment here saying you agree and we will review and merge your code, and add your name to the CONTRIBUTORS file.

Thanks again!