Add information for webclient and screenshot

README.md

@@ -10,7 +10,11 @@ docker pull gutmensch/raumserver
 docker run --net=host -ti gutmensch/raumserver start.sh
 ```
 
-## Version and zone config
+## WebClient
+This image now features a simple AJAX webclient. By default it should be available after running the image at http://docker:3535/. The Quick Source menu is not yet dynamic. Take a look at the top of main.js, if you want to rebuild - Playlists and HTTP Streams are supported, I didn't get containers to work (see loadContainer in the raumserver documentation). The client's interface was designed to be as suitable for smartphones/tablets as possible, therefor some constraints with regards to line length etc. pp.
+![webclient](https://github.com/gutmensch/docker-raumserver/raw/master/images/screenshot.png "Webclient Screenshot")
+
+## Raumserver version and zone config
 ```
 $ curl docker:3535/raumserver/data/getVersion | python -mjson.tool
 {