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"?>
<BeremizRoot URI_location="LOCAL://">
  <TargetType>
    <Win32 CFLAGS="" Linker="g++" LDFLAGS=""/>
  </TargetType>
</BeremizRoot>