Make information about translation to be in unicode

This is necessary because some translator's names contains non-ASCII
characters and they are not handled properly in about dialog on Windows

<?xml version='1.0' encoding='utf-8'?>
<BeremizRoot URI_location="LOCAL://">
  <TargetType/>
  <Libraries Enable_SVGUI_Library="true" Enable_Python_Library="true"/>
</BeremizRoot>