Update readme links. Add contributing guide.

Author: dongilbert

CONTRIBUTING.md

@@ -0,0 +1,12 @@
+# Contributing
+
+League\Di is an open source project released under the MIT license.
+Anyone can contribute, just follow a few simple guidelines:
+
+- Code should follow the [PSR-2 Style Guide][1]
+- Unit Test Coverage. (League\Di is 100% covered now, let's keep it that way.)
+- Contributions are either [MIT][2] or [DBAD][3] licensed
+
+[1]: https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md
+[2]: http://opensource.org/licenses/MIT
+[3]: http://www.dbad-license.org/

README.md

@@ -76,15 +76,15 @@ Alternatively, you can specify what to inject into the class upon instantiation.
 
 ## Contributing
 
-Please see [CONTRIBUTING](https://github.com/dongilbert/loep-di/blob/master/CONTRIBUTING.md) for details.
+Please see [CONTRIBUTING](https://github.com/php-loep/di/blob/master/CONTRIBUTING.md) for details.
 
 
 ## Credits
 
 - [Don Gilbert](https://github.com/dongilbert)
-- [All Contributors](https://github.com/dongilbert/loep-di/contributors)
+- [All Contributors](https://github.com/php-loep/di/contributors)
 
 
 ## License
 
-The MIT License (MIT). Please see [License File](https://github.com/dongilbert/loep-di/blob/master/LICENSE) for more information.
+The MIT License (MIT). Please see [License File](https://github.com/php-loep/di/blob/master/LICENSE) for more information.