Replace ExtendedDict with defaultdict in chibitest.
Replace ExtendedDict with defaultdict in chibitest.

FSX/misaka,lepture/misaka,hepochen/hoedown_misaka,hepochen/hoedown_misaka,Weasyl/misaka,Weasyl/misaka,lepture/misaka,Weasyl/misaka,FSX/misaka,FSX/misaka,Weasyl/misaka,lepture/misaka,hepochen/hoedown_misaka,Weasyl/misaka,FSX/misaka