[xmonad] xmobar with utf8 support

Hi, today I pushed a few patches to add utf8 support to xmobar. I don't think I'm going to add full locale support, since utf8 seems to be fine for a minimalistic status bar (moreover, locale support requires iconv). I just need to write a battery plugin with the possibility of setting the filepath where to retrieve battery information and then I'll make the 0.9 release. So, if you want to give it a try and find a bug, or have some other features you would like to see implemented before 0.9, speak now, or forever...whatever. Cheers, Andrea