docs: update readme and screenshots

README.md

@@ -1,10 +1,15 @@
-# IPTV Player PWA
+# IPTVnator - IPTV Player Application
+
+
+[![Get it from the Snap Store](https://snapcraft.io/static/images/badges/en/snap-store-black.svg)](https://snapcraft.io/iptvnator)
 
 |                       Select/upload a playlist                       |                   Main player interface                   |
 | :------------------------------------------------------------------: | :-------------------------------------------------------: |
 | ![List with added playlists and upload interface](./iptv-upload.png) | ![Sidebar with channel and video player](./iptv-main.png) |
 
-## Minimalistic IPTV player application developed as a cross-platform Electron application.
+**IPTVnator** is a video player application that provides support for IPTV playlists (m3u, m3u8). The application is an open source project based on Electron.
+
+First version of the application which was developed as a PWA is available in an extra git branch.
 
 **Features:**
 
@@ -13,4 +18,4 @@
 -   Upload remote playlists via URL
 -   Group-based channel list
 -   Search for channels
--   Save channels as favorites
+-   Save channels as favorites (DEV)