Create Contributing,yml

Contributing,yml

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+# Contributing: submitting patches and tutorials
+
+## Submitting a pull request
+
+### Contributor License Agreements
+
+We'd love to accept your code patches! However, before we can take them, we
+have to jump a couple of legal hurdles.
+
+Please fill out either the individual or corporate Contributor License
+Agreement.
+
+* If you are an individual writing original source code and you're sure you
+  own the intellectual property, then sign an [individual CLA](https://developers.google.com/open-source/cla/individual)
+  .
+* If you work for a company that wants to allow you to contribute your work,
+  then sign a [corporate CLA](https://developers.google.com/open-source/cla/corporate).
+
+Follow either of the two links above to access the appropriate CLA and
+instructions for how to sign and return it.
+
+1. Sign the contributors license agreement above.
+1. Decide which code you want to submit. A submission should be a set of changes
+   that addresses one issue in the [issue tracker](https://github.com/Google/WebFundamentals/issues).
+   Please don't mix more than one logical change per submission, because it makes
+   the history hard to follow. If you want to make a change
+   (e.g. add a sample or feature) that doesn't have a corresponding issue in the
+   issue tracker, please create one.
+1. **Submitting**: When you are ready to submit, send us a Pull Request. Be
+   sure to include the issue number you've fixed and the name you used to sign
+   the CLA.