Added Radarr

Radarr is a popular fork of Sonarr, which the community is embracing over CouchPotato for movie automation. This PR aims to add it into the list.

README.md

@@ -135,6 +135,7 @@ _Business Intelligence_
   * [openHAB](http://www.openhab.org) - Vendor and technology agnostic open source software for home automation. ([Source Code](https://github.com/openhab/openhab)) `EPLv1` `Java`
   * [Poffer](http://poffer.gabinaureche.com) `⚠` - A tool that makes it easier to share the content you like thanks to Pocket+Buffer. ([Source Code](https://github.com/Zhouzi/Poffer)) `MIT` `Nodejs`
   * [pyLoad](https://pyload.net/) - Lightweight, customizable and remotely manageable downloader for 1-click-hosting sites like rapidshare.com or uploaded.to. ([Source Code](https://github.com/pyload/pyload)) `GPLv3` `Python`
+  * [Radarr](https://radarr.video/) - Radarr is an independent fork of Sonarr reworked for automatically downloading movies via Usenet and BitTorrent, à la Couchpotato. ([Source Code](https://github.com/Radarr/Radarr)) `GPLv3` `C#`
   * [RSS-Bridge](https://github.com/sebsauvage/rss-bridge) - rss-bridge is a PHP project capable of generating ATOM feeds for websites which don't have one. `Public domain` `PHP`
   * [SickRage](http://sickrage.github.io/) - SickRage is an automatic Video Library Manager for TV Shows. Automatic torrent/nzb searching, downloading, and processing at the qualities you want. ([Source Code](https://github.com/SickRage/SickRage/)) `GPLv3` `Python`
   * [Sonarr](https://sonarr.tv/) - An automatic TV Shows downloader and manager for Usenet and BitTorrent. It can grab, sort and rename new episodes and automatically upgrade the quality of files already downloaded when a better quality format becomes available. ([Source Code](https://github.com/Sonarr/Sonarr)) `GPLv3` `C#`