update Simplified Chinese (zh_CN) translation
update Simplified Chinese (zh_CN) translation

mono/f-spot,Sanva/f-spot,dkoeb/f-spot,mans0954/f-spot,NguyenMatthieu/f-spot,mans0954/f-spot,GNOME/f-spot,NguyenMatthieu/f-spot,Yetangitu/f-spot,Sanva/f-spot,NguyenMatthieu/f-spot,mans0954/f-spot,mans0954/f-spot,mono/f-spot,dkoeb/f-spot,mono/f-spot,dkoeb/f-spot,Yetangitu/f-spot,mono/f-spot,GNOME/f-spot,Yetangitu/f-spot,GNOME/f-spot,Sanva/f-spot,mono/f-spot,Sanva/f-spot,dkoeb/f-spot,GNOME/f-spot,NguyenMatthieu/f-spot,Yetangitu/f-spot,NguyenMatthieu/f-spot,dkoeb/f-spot,mans0954/f-spot,Sanva/f-spot,mans0954/f-spot,GNOME/f-spot,Yetangitu/f-spot,dkoeb/f-spot,mono/f-spot