Renew the updater branch

Now with some actual consensus on what the updater will do!

logic/GoUpdate.h

@@ -0,0 +1,43 @@
+#pragma once
+#include "net/NetJob.h"
+
+class GoUpdate : public QObject
+{
+	Q_OBJECT
+
+public:
+	struct version_channel
+	{
+		QString id;
+		QString name;
+		int latestVersion;
+	};
+
+	struct version_summary
+	{
+		int id;
+		QString name;
+	};
+
+signals:
+	void updateAvailable();
+
+private slots:
+	void updateCheckFinished();
+	void updateCheckFailed();
+
+public:
+	GoUpdate();
+	void checkForUpdate();
+private:
+	NetJobPtr index_job;
+	NetJobPtr fromto_job;
+
+	QString repoUrlBase;
+	QString builderName;
+	int currentBuildIndex;
+	int newBuildIndex = -1;
+
+	QList<version_summary> versions;
+	QList<version_channel> channels;
+};