Use HttpMetaCache to minimize network use.

logic/net/ByteArrayDownload.h

@@ -0,0 +1,24 @@
+#pragma once
+#include "Download.h"
+
+class ByteArrayDownload: public Download
+{
+	Q_OBJECT
+public:
+	ByteArrayDownload(QUrl url);
+	
+public:
+	/// if not saving to file, downloaded data is placed here
+	QByteArray m_data;
+	
+public slots:
+	virtual void start();
+	
+protected slots:
+	void downloadProgress(qint64 bytesReceived, qint64 bytesTotal);
+	void downloadError(QNetworkReply::NetworkError error);
+	void downloadFinished();
+	void downloadReadyRead();
+};
+
+typedef QSharedPointer<ByteArrayDownload> ByteArrayDownloadPtr;