'README.md' ändern

README.md

 * Script to get the state of single GPIO's ("python3 gpioctrl.py CCU6_001 stat" )
 * implement gpio_daemon with XMP:RPC interface for remote access
 
+## GPIO's pin assignment raspberryPI
+![GPIO description](https://www.computerhilfen.de/info/wp-content/uploads/2016/04/computerhilfen_de-gpio.png "GPIO")