Sketcher: Extension of Copy/Array functionality to clone

=============================================================

This commit allows the user to select in advance whether he wants a simple copy or a clone.

This involves substitution of dimensional constraints in the copies by equality and parallel constraints.

Terminology change for Arrays, now it is Rectangular array

src/Mod/Sketcher/Gui/SketchRectangularArrayDialog.h

@@ -0,0 +1,56 @@
+/***************************************************************************
+ *   Copyright (c) 2015 Abdullah Tahiri <abdullah.tahiri.yo@gmail.com>     *
+ *                                                                         *
+ *   This file is part of the FreeCAD CAx development system.              *
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or         *
+ *   modify it under the terms of the GNU Library General Public           *
+ *   License as published by the Free Software Foundation; either          *
+ *   version 2 of the License, or (at your option) any later version.      *
+ *                                                                         *
+ *   This library  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 Library General Public License for more details.                  *
+ *                                                                         *
+ *   You should have received a copy of the GNU Library General Public     *
+ *   License along with this library; see the file COPYING.LIB. If not,    *
+ *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
+ *   Suite 330, Boston, MA  02111-1307, USA                                *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef SKETCHERGUI_SketchRectangularArrayDialog_H
+#define SKETCHERGUI_SketchRectangularArrayDialog_H
+
+#include <Base/Placement.h>
+#include <QDialog>
+
+namespace SketcherGui {
+
+class Ui_SketchRectangularArrayDialog;
+class SketchRectangularArrayDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    SketchRectangularArrayDialog(void);
+    ~SketchRectangularArrayDialog();
+
+    void accept();
+    
+    int Rows;
+    int Cols;
+    bool ConstraintSeparation;
+    bool EqualVerticalHorizontalSpacing;
+    bool Clone;
+
+protected:
+    void updateValues(void);
+private:
+    Ui_SketchRectangularArrayDialog* ui;
+};
+
+}
+
+#endif // SKETCHERGUI_SketchRectangularArrayDialog_H