WIP - added project data model files for well log plots

Added command feature for adding new well log plots (right-click "Plots"
in the project tree view). Will create dummy Qwt widget added as an MDI
window.
TODO: Complete the relations between the entities, and add
properties/property editors. Create more advanced viewer widget for
plotting of multiple traces with multiple curves. Harmonize MDI stuff
with 3D viewers.

ApplicationCode/UserInterface/RiuWellLogPlot.h

@@ -0,0 +1,38 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) 2015-     Statoil ASA
+//  Copyright (C) 2015-     Ceetron Solutions AS
+// 
+//  ResInsight is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+// 
+//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
+//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//  FITNESS FOR A PARTICULAR PURPOSE.
+// 
+//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html> 
+//  for more details.
+//
+/////////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+#include "qwt_plot.h"
+
+//==================================================================================================
+//
+// RiuWellLogPlot
+//
+//==================================================================================================
+class RiuWellLogPlot : public QwtPlot
+{
+    Q_OBJECT
+
+public:
+    RiuWellLogPlot(QWidget* parent = NULL);
+    virtual ~RiuWellLogPlot();
+
+};
+