Get rid of QNAM (now subclassed and less needy). Basic LWJGL download and extraction.

backend/BaseUpdate.cpp

@@ -0,0 +1,18 @@
+#include "BaseUpdate.h"
+
+BaseUpdate::BaseUpdate ( BaseInstance* inst, QObject* parent ) : Task ( parent )
+{
+	m_inst = inst;
+}
+
+void BaseUpdate::error ( const QString& msg )
+{
+	emit gameUpdateError(msg);
+}
+
+void BaseUpdate::updateDownloadProgress(qint64 current, qint64 total)
+{
+	// The progress on the current file is current / total
+	float currentDLProgress = (float) current / (float) total;
+	setProgress((int)(currentDLProgress * 100)); // convert to percentage
+}