Added "runtime.py", a file that is executed in python thread in runtime, before handling python_eval FBs requests. Added small python editor taken from wxPython demo, and appropriate icon and button to launch it.
<?xml version="1.0" encoding="UTF-8"?>
<CanFestivalNode CAN_Device="127.0.0.1" CAN_Baudrate="125K" NodeId="0"/>