Add contributor and readme md files

Author: clagiordano

CONTRIBUTORS.md

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+# Contributors list
+
+**Claudio Giordano** - [clagiordano](https://github.com/clagiordano)

README.md

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+# PHPUnit result printer
+
+PHPUnit result printer is a custom phpunit result printer with pretty output and timings
+
+## Getting Started
+
+These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.
+
+### Prerequisites
+
+What things you need to install the software and how to install them
+
+- php >= 5.4
+- composer
+
+### Installing
+
+The recommended way to install phpunit-result-printer is through [Composer](https://getcomposer.org).
+
+```bash
+composer require clagiordano/phpunit-result-printer
+```
+
+After install you can edit your phpunit.xml as follow:
+
+```
+<phpunit
+    ...
+    printerClass="clagiordano\PhpunitResultPrinter\ResultPrinter"
+>
+...
+</phpunit>
+```
+
+A full phpunit.xml example:
+
+```xml
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit backupGlobals="false"
+         backupStaticAttributes="false"
+         bootstrap="vendor/autoload.php"
+         colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         processIsolation="false"
+         stopOnFailure="false"
+         verbose="true"
+         printerClass="clagiordano\PhpunitResultPrinter\ResultPrinter"
+        >
+    <testsuites>
+        <testsuite name="Package Test Suite">
+            <directory suffix=".php">./tests/</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
+```
+
+## Running the tests
+
+You can clone and test this project with the following commands:
+
+```bash
+git clone https://github.com/clagiordano/phpunit-result-printer.git
+cd phpunit-result-printer
+composer install
+./vendor/bin/phpunit
+```
+
+One of the previous tests fails for demo purpose
+
+
+## Contributing
+
+Please read [CONTRIBUTING.md](https://gist.github.com/PurpleBooth/b24679402957c63ec426) for details on our code of conduct, and the process for submitting pull requests to us.
+
+## Versioning
+
+We use [SemVer](http://semver.org/) for versioning. For the versions available, see the [tags on this repository](https://github.com/your/project/tags). 
+
+## Authors
+
+* **Claudio Giordano** - *Initial work* - [clagiordano](https://github.com/clagiordano)
+
+See also the list of [contributors](CONTRIBUTORS.md) who participated in this project.
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE.md](LICENSE.md) file for details