add links to website and documentation to README

Signed-off-by: Stefan Nussbaumer <st9fan@gmail.com>

README.md

@@ -3,6 +3,9 @@
 VideOSC is an experimental OSC controller for Android that uses the color information coming from the device' in-built camera(s) to control the generation of electronic sounds or other media.
 This repository is a complete rewrite of the app's first version (written using Processing, a Java-based programming environment for creative coding). The repository contains new features as well as it's focusing on stability (e.g. avoiding memory leaks) and enhanced user experience.
 
+Website: http://videosc.net 
+User documentation: http://pustota.basislager.org/coding/videosc/videosc-the-interface/
+
 ![screenshot 1](https://github.com/nuss/VideOSC2/blob/develop/screenshots/Screenshot_2019-09-04_175813.jpg)