Material: Material appearance

Uses new material system for appearance

Each feature object now has a property called ShapeMaterial that
describes its physical properties. If it has a shape, it has a
material.

The ShapeColor attribute is replaced by a ShapeAppearance attribute.
This is a material list that describes all appearance properties, not
just diffuse color. As a list in can be used for all elements of a
shape, such as edges and faces.

A new widget is provided to allow the user to select materials in a
consistent fashion. It can also launch the material editor with its
more advanced capabilities.

src/Mod/Import/Gui/ImportOCAFGui.cpp

@@ -50,7 +50,7 @@ void ImportOCAFGui::applyFaceColors(Part::Feature* part, const std::vector<App::
     }
 
     if (colors.size() == 1) {
-        vp->ShapeColor.setValue(colors.front());
+        vp->ShapeAppearance.setDiffuseColor(colors.front());
         vp->Transparency.setValue(100 * colors.front().a);
     }
     else {