docs: beautify readme

README.md

@@ -1,8 +1,28 @@
 # BigBlueButton™ integration for Nextcloud
 
-:arrow_right: __This app uses BigBlueButton and is not endorsed or certified by BigBlueButton Inc. BigBlueButton and the BigBlueButton Logo are trademarks of BigBlueButton Inc.__
+[![Build Status](https://travis-ci.org/sualko/cloud_bbb.svg?branch=master)](https://travis-ci.org/sualko/cloud_bbb)
+![Downloads](https://img.shields.io/github/downloads/sualko/cloud_bbb/total.svg)
+![GitHub release](https://img.shields.io/github/release/sualko/cloud_bbb.svg)
+
+This app allows to create meetings with an external installation of [BigBlueButton](https://bigbluebutton.org).
+
+:clap: Developer wanted! If you have time it would be awesome if you could help to enhance this application.
+
+![Screenshot configuration](https://github.com/sualko/cloud_bbb/raw/master/docs/screenshot-configuration.png)
+
+__This app uses BigBlueButton and is not endorsed or certified by BigBlueButton Inc. BigBlueButton and the BigBlueButton Logo are trademarks of BigBlueButton Inc.__
+
+## :heart_eyes: Features
+This integration provides the following features:
+
+* **Room setup** Create multiple room configurations with name, welcome message, ...
+* **Share guest link** Share the room link with all your guests
+* **Custom presentation** Start a room with a selected presentation from your file browser
+
+## :rocket: Install it
+The easiest way to install this app is by using the [Nextcloud app store](https://apps.nextcloud.com/apps/bbb).
+If you like to build from source, please continue reading.
 
-## Install it
 To install it change into your Nextcloud's apps directory:
 
     cd nextcloud/apps
@@ -16,27 +36,27 @@ Then install the dependencies using:
     make build
 
 
-## configure it
+## :gear: Configure it
 find out your BBB secrets by '''sudo bbb-conf --secret'''
 
 enter these secrets in the BigBlueButton settings on the general configuration page of your NC
 
-## create your first room
+## Create your first room
-go to your personal settings page
+Got to the BigBlueButton section inside your personal settings page and enter a
+room name. That's it. You can now distribute the room url.
 
-find the BigBlueButton section
+## Enter a room from files
+Use the ... menu and select the desired BBB configuration to enter the room.
+Beware that if the room is already running the presentation will **not** be
+updated.
 
-enter a room name
+![Screenshot file browser](https://github.com/sualko/cloud_bbb/raw/master/docs/screenshot-file-browser.png)
-
-enter the room by pointing to the arrow button
-
-## enter a room from files
-
-use the ... menu
-
-select the correct BBB room and enter the room
 
 # Troubleshooting
 - before installing, make sure your BBB is running correctly
-- if no session opens with the ... menu of files, but a session opens in the general configuration page, look at your browser console. It will show a well hidden complaint that for sharing always a password is required. If this is the case, remove that requirement in sharing / enforce password. 
+- if no session opens with the ... menu of files, but a session opens in the
-- if the room doesn't appear in the ... menu of files, a browser/cache reload might help
+  general configuration page, look at your browser console. It will show a well
+  hidden complaint that for sharing always a password is required. If this is
+  the case, remove that requirement in sharing / enforce password.
+- if the room doesn't appear in the ... menu of files, a browser/cache reload
+  might help