Do not need a 16MB buffer in this use case (downloaded gz file is not…

… even that large).

SongDataCore/BeatStar/BeatStarDatabase.cs

@@ -11,7 +11,7 @@ public class BeatStarDatabase : DatabaseDownloader, IDatabaseDownloadHandler
 
         public BeatStarDataFile Data = null;
 
-        protected byte[] Buffer = new byte[16 * 1048576];
+        protected byte[] Buffer = new byte[4096];
 
         CacheableBeatStarDownloaderHandler _lastCacheHandler;