Add CONTRIBUTING.md with link to CLA and add some simple PR / issue templates.

Author: agudian

.github/CONTRIBUTING.md

@@ -0,0 +1,19 @@
+# Contributing
+
+Thanks for choosing to contribute!
+
+The following are a set of guidelines to follow when contributing to this project.
+
+## Code Of Conduct
+
+This project adheres to the Adobe [code of conduct](../CODE_OF_CONDUCT.md). By participating, you are expected to uphold this code. Please report unacceptable behavior to [email protected].
+
+## Contributor License Agreement
+
+All third-party contributions to this project must be accompanied by a signed contributor license. This gives Adobe permission to redistribute your contributions as part of the project. Sign our [CLA](http://adobe.github.io/cla.html). You only need to submit an Adobe CLA one time, so if you have submitted one previously, you are probably good to go!
+
+## Code Reviews
+
+All submissions should come in the form of pull requests and need to be reviewed by project committers. Read [GitHub's pull request documentation](https://help.github.com/articles/about-pull-requests/) for more information on sending pull requests.
+
+Lastly, please follow the [pull request template](PULL_REQUEST_TEMPLATE.md) when submitting a pull request!

.github/ISSUE_TEMPLATE.md

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+## Description
+<!--- Describe your changes -->
+
+## Related Issue
+<!--- if applicable -->
+
+## Tasks
+<!--- These tasks need to be done in order to get the PR merged, please mark with `x` if done or if they are not applicable to you or the change -->
+
+- [ ] I have signed the [CLA](http://adobe.github.io/cla.html).
+- [ ] I have written tests and verified that they fail without my change.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,5 @@
+Copyright 2018 Adobe
+
+Adobe holds the copyright for all the files found in this repository.
+
+See the LICENSE file for licensing information.

COPYRIGHT

@@ -67,11 +67,9 @@ The test [`S3MockRuleTest`](src/test/java/com/adobe/testing/s3mock/S3MockRuleTes
 <dependency>
 ```
 
-### Contribution
+### Contributing
 
-Contributions are welcome. Please fork the project and create for your finished feature a pull request.
-
-Our [Adobe Code of Conduct](CODE_OF_CONDUCT.md) applies.
+Contributions are welcomed! Read the [Contributing Guide](CONTRIBUTING.md) for more information.
 
 ### Licensing