GH-926 implement log cleaning functionality

Also adds gzip compressed log support

logic/GZip.h

@@ -0,0 +1,9 @@
+#pragma once
+#include <QByteArray>
+
+class GZip
+{
+public:
+	static bool inflate(const QByteArray &compressedBytes, QByteArray &uncompressedBytes);
+};
+