entity: moved code to parse_song_pair()
entity: moved code to parse_song_pair()

cmende/libmpdclient,sl0th/libmpdclient,psych0tik/libmpdclient2,yusiwen/libmpdclient,sl0th/libmpdclient,psych0tik/libmpdclient2,cmende/libmpdclient,OpenInkpot-archive/iplinux-libmpdclient,jagleeso/libmpdclient,OpenInkpot-archive/iplinux-libmpdclient,jwise/libmpdclient,jwise/libmpdclient,yusiwen/libmpdclient,yusiwen/libmpdclient,sl0th/libmpdclient,cmende/libmpdclient,jwise/libmpdclient,jagleeso/libmpdclient,jagleeso/libmpdclient