README.md: Add getting started notes

Add the exact steps to get stareted with the provided examples
in Arduino IDE by importing the libraries, compiling and
uploading the sketches to Olimex eduArdu.

Signed-off-by: Leon Anavi <leon@anavi.org>

README.md

@@ -4,3 +4,12 @@ Open Source Hardware Educational board based on Arduino Leonardo
 Product page: https://www.olimex.com/Products/Duino/AVR/eduArdu/open-source-hardware
 
 Introduction video: https://youtu.be/3kFrveMF56s
+
+# Getting started
+
+## Arduino IDE
+
+* [Download and install Arduino IDE](https://www.arduino.cc/en/Main/Software)
+* Open Arduino IDE
+* Click **Sketch > Include Library > Add .ZIP library...** and add all libraries provided with this repository
+* Open a sketch, compile and upload it to Olimex eduArdu