Alphabetize API

README.md

 ## API
 *Libraries and web tools for developing APIs.*
 
+* [API Platform](https://api-platform.com ) - Expose in minutes an hypermedia REST API that embraces JSON-LD, Hydra format.
 * [Apigility](https://github.com/zfcampus/zf-apigility-skeleton) - An API builder built with Zend Framework 2.
-* [Hateoas](https://github.com/willdurand/Hateoas) - A HATEOAS REST web service library.
+* [Drest](https://github.com/leedavis81/drest) - A library for exposing Doctrine entities as REST resource endpoints.
 * [HAL](https://github.com/blongden/hal) - A Hypertext Application Language (HAL) builder library.
+* [Hateoas](https://github.com/willdurand/Hateoas) - A HATEOAS REST web service library.
 * [Negotiation](https://github.com/willdurand/Negotiation) - A content negotiation library.
-* [Drest](https://github.com/leedavis81/drest) - A library for exposing Doctrine entities as REST resource endpoints.
 * [Restler](https://github.com/Luracast/Restler) - A lightweight framework to expose PHP methods as RESTful web API.
 * [wsdl2phpgenerator](https://github.com/wsdl2phpgenerator/wsdl2phpgenerator) - A tool to generate PHP classes from SOAP WSDL files.
-* [API Platform](https://api-platform.com ) - Expose in minutes an hypermedia REST API that embraces JSON-LD, Hydra format.
 
 ## Caching
 *Libraries for caching data.*