Merge pull request #719 from funkyfundev/master

Added Swagger api documenter

README.md

 * [daux.io](https://github.com/dauxio/daux.io) - A documentation generator which uses Markdown files.
 * [PHP Documentor 2](https://github.com/phpDocumentor/phpDocumentor) - A documentation generator.
 * [phpDox](https://phpdox.net/) - A documentation generator for PHP projects (that is not limited to API documentation).
+* [zircote/swagger-php](https://github.com/zircote/swagger-php) - Generate OpenAPI documentation for your RESTful API.
 
 ### Security
 *Libraries for generating secure random numbers, encrypting data and scanning and testing for vulnerabilities.*