Update README.md (#695)

* Update README.md

Added QRtag.net API

* Update README.md

changed + to and

README.md

@@ -233,6 +233,7 @@ API | Description | Auth | HTTPS | CORS | Link |
 | Myjson | A simple JSON store for your web or mobile app | No | No | Unknown | [Go!](http://myjson.com/api) |
 | Plino | Spam filtering system | No | Yes | Unknown | [Go!](https://plino.herokuapp.com/) |
 | Public APIs | A collective list of free JSON APIs for use in web development | No | Yes | Unknown | [Go!](https://github.com/davemachado/public-api) |
+| QR code | Create an easy to read QR code and URL shortener | No | Yes | Yes | [Go!](http://qrtag.net/api/) |
 | QR code | Generate and decode / read QR code graphics | No | Yes | Unknown | [Go!](http://goqr.me/api/) |
 | ReqRes | A hosted REST-API ready to respond to your AJAX requests | No | Yes | Unknown | [Go!](https://reqres.in/ ) |
 | Scrape Website Email | Grabs email addresses from a URL | `X-Mashape-Key` | Yes | Unknown | [Go!](https://market.mashape.com/tommytcchan/scrape-website-email) |