File list (Check if you may need any files):
TopSongs
........\Application
........\...........\AppDelegate.h
........\...........\AppDelegate.m
........\...........\CategoryCache.h
........\...........\CategoryCache.m
........\...........\iTunesRSSImporter.h
........\...........\iTunesRSSImporter.m
........\...........\main.m
........\Controllers
........\...........\SongDetailsController.h
........\...........\SongDetailsController.m
........\...........\SongsViewController.h
........\...........\SongsViewController.m
........\en.lproj
........\........\Localizable.strings
........\........\MainWindow.xib
........\........\SongDetailsView.xib
........\........\SongsView.xib
........\Images
........\......\Icon-Small.png
........\......\Icon-Small@2x.png
........\......\Icon.png
........\......\Icon@2x.png
........\......\iTunesArtwork.png
........\Info.plist
........\Model
........\.....\Category.h
........\.....\Category.m
........\.....\Song.h
........\.....\Song.m
........\.....\TopSongs.xcdatamodel
........\.....\....................\elements
........\.....\....................\layout
........\Prefix.pch
........\ReadMe.txt
........\TopSongs.xcodeproj
........\..................\project.pbxproj