Merge pull request #1225 from fheilz/master

added reSmush.it API

README.md

@@ -705,6 +705,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Pexels](https://www.pexels.com/api/) | Free Stock Photos and Videos | `apiKey` | Yes | Yes |
 | [Pixabay](https://pixabay.com/sk/service/about/api/) | Photography | `apiKey` | Yes | Unknown |
 | [PlaceKitten](https://placekitten.com/) | Resizable kitten placeholder images | No | Yes | Unknown |
+| [ReSmush.it](https://resmush.it/api) | Photo optimization | No | No | Unknown |
 | [ScreenShotLayer](https://screenshotlayer.com) | URL 2 Image | No | Yes | Unknown |
 | [Unsplash](https://unsplash.com/developers) | Photography | `OAuth` | Yes | Unknown |
 | [Wallhaven](https://wallhaven.cc/help/api) | Wallpapers | `apiKey` | Yes | Unknown |