Add PHP-Noise API to Art & Design

PHP-Noise is a Noise-Background-Image-Generator.
The API is documented right under the form on the website. For more documentation, you can provide the help parameter to the API.

README.md

@@ -117,6 +117,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Icons8](http://docs.icons8.apiary.io/#reference/0/meta) | Icons | `OAuth` | Yes | Unknown |
 | [Metropolitan Museum of Art](https://metmuseum.github.io/) | Met Museum of Art | No | Yes | Unknown |
 | [Noun Project](http://api.thenounproject.com/index.html) | Icons | `OAuth` | No | Unknown |
+| [PHP-Noise](https://php-noise.com/) | Noise Background Image Generator | No | Yes | Yes |
 | [Pixel Encounter](https://pixelencounter.com/api) | SVG Icon Generator | No | Yes | No |
 | [Rijksmuseum](https://www.rijksmuseum.nl/en/api) | Art | `apiKey` | Yes | Unknown |