Add dialog communication platform (#1160)

* added dialog communication platform

* removed fever

non-free.md

@@ -12,6 +12,7 @@
 
 ## Communication Systems
 
+  * [Dialog](https://dlg.im) `⊘ Proprietary` - Handy and feature-rich multi-device solution with native mobile clients, SIP integration, chatbots, 3rd-party integrations. It brings communication efficiency without sacrificing privacy. Works in closed circuit, encrypts push notifications. ([Demo](https://dlg.im/en/download)) `Scala/Go`
   * [HipChat](https://www.atlassian.com/software/hipchat) `⊘ Proprietary` - A team chat solution with 1:1 chat audio and video, third party integration and more `PHP/Python`
 
   
@@ -27,11 +28,6 @@
   * [Auth0](https://auth0.com/docs/appliance): `⊘ Proprietary`. Identity made simple for developers. `NodeJS`
 
   
-## Feed Readers
-
-  * [Fever](http://feedafever.com/) `⊘ Proprietary` - Self-hosted feed aggregator that can sort items by popularity `PHP`
-
-
 ## File Sharing and Synchronization
 
   * [Resilio Sync](https://www.resilio.com/) `⊘ Proprietary` - Resilio Sync by Resilio, Inc is a proprietary peer-to-peer file synchronisation tool.