S3 bucket listing support and network code refactors.

* Adds support for listing all objects in an S3 bucket.
* Renames a bunch of network related classes (Download->Action)
* Net actions now have static constructors

logic/net/NetJob.h

@@ -0,0 +1,94 @@
+#pragma once
+#include <QtNetwork>
+#include <QLabel>
+#include "NetAction.h"
+#include "ByteArrayDownload.h"
+#include "FileDownload.h"
+#include "CacheDownload.h"
+#include "HttpMetaCache.h"
+#include "ForgeXzDownload.h"
+#include "logic/tasks/ProgressProvider.h"
+
+class NetJob;
+typedef std::shared_ptr<NetJob> NetJobPtr;
+
+class NetJob : public ProgressProvider
+{
+	Q_OBJECT
+public:
+	explicit NetJob(QString job_name) : ProgressProvider(), m_job_name(job_name) {};
+
+	template <typename T>
+	bool addNetAction(T action)
+	{
+		NetActionPtr base = std::static_pointer_cast<NetAction>(action); 
+		base->index_within_job = downloads.size();
+		downloads.append(action);
+		parts_progress.append(part_info());
+		total_progress++;
+		return true;
+	}
+
+	NetActionPtr operator[](int index)
+	{
+		return downloads[index];
+	}
+	;
+	NetActionPtr first()
+	{
+		if (downloads.size())
+			return downloads[0];
+		return NetActionPtr();
+	}
+	int size() const
+	{
+		return downloads.size();
+	}
+	virtual void getProgress(qint64 &current, qint64 &total)
+	{
+		current = current_progress;
+		total = total_progress;
+	}
+	;
+	virtual QString getStatus() const
+	{
+		return m_job_name;
+	}
+	;
+	virtual bool isRunning() const
+	{
+		return m_running;
+	}
+	;
+	QStringList getFailedFiles();
+signals:
+	void started();
+	void progress(qint64 current, qint64 total);
+	void filesProgress(int, int, int);
+	void succeeded();
+	void failed();
+public
+slots:
+	virtual void start();
+private
+slots:
+	void partProgress(int index, qint64 bytesReceived, qint64 bytesTotal);
+	void partSucceeded(int index);
+	void partFailed(int index);
+
+private:
+	struct part_info
+	{
+		qint64 current_progress = 0;
+		qint64 total_progress = 1;
+		int failures = 0;
+	};
+	QString m_job_name;
+	QList<NetActionPtr> downloads;
+	QList<part_info> parts_progress;
+	qint64 current_progress = 0;
+	qint64 total_progress = 0;
+	int num_succeeded = 0;
+	int num_failed = 0;
+	bool m_running = false;
+};