Move all the things (YES. Move them.)

Also, implemented some basic modlist logic, to be wired up.

logic/net/DownloadJob.h

@@ -0,0 +1,51 @@
+#pragma once
+#include "JobQueue.h"
+#include <QtNetwork>
+
+/**
+ * A single file for the downloader/cache to process.
+ */
+class LIBUTIL_EXPORT DownloadJob : public Job
+{
+	Q_OBJECT
+public:
+	DownloadJob(QUrl url,
+				QString rel_target_path = QString(),
+				QString expected_md5 = QString()
+			   );
+	static JobPtr create(QUrl url, QString rel_target_path = QString(), QString expected_md5 = QString());
+public slots:
+	virtual void start();
+	
+private slots:
+	void downloadProgress(qint64 bytesReceived, qint64 bytesTotal);;
+	void downloadError(QNetworkReply::NetworkError error);
+	void downloadFinished();
+	void downloadReadyRead();
+	
+public:
+	/// the network reply
+	QSharedPointer<QNetworkReply> m_reply;
+	/// source URL
+	QUrl m_url;
+	
+	/// if true, check the md5sum against a provided md5sum
+	/// also, if a file exists, perform an md5sum first and don't download only if they don't match
+	bool m_check_md5;
+	/// the expected md5 checksum
+	QString m_expected_md5;
+	
+	/// save to file?
+	bool m_save_to_file;
+	/// is the saving file already open?
+	bool m_opened_for_saving;
+	/// if saving to file, use the one specified in this string
+	QString m_target_path;
+	/// this is the output file, if any
+	QFile m_output_file;
+	/// if not saving to file, downloaded data is placed here
+	QByteArray m_data;
+	
+	/// The file's status
+	JobStatus m_status;
+};