Merge pull request #576 from saulotoledo/PINQ

Updated PINQ's description.

README.md

 * [PHP Object Storage](https://github.com/kherge-abandoned/php-object-storage) - A library for object storage.
 * [Fractal](https://github.com/thephpleague/fractal) - A library for converting complex data structures to JSON output.
 * [Totem](https://github.com/Wisembly/Totem) - A library to manage and create data changesets.
-* [PINQ](https://github.com/TimeToogo/Pinq) - A real Linq library for PHP.
+* [PINQ](https://github.com/TimeToogo/Pinq) - A PHP library based on .NET's LINQ (Language Integrated Query).
 * [JsonMapper](https://github.com/netresearch/jsonmapper) - A library that maps nested JSON structures onto PHP classes.
 * [Cake Collection](https://github.com/cakephp/collection) - A simple collections library (CP).