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/Gui/StartupProcess.cpp

@@ -451,6 +451,9 @@ void StartupPostProcess::showMainWindow()
 
 void StartupPostProcess::activateWorkbench()
 {
+    // Always activate the material workbench
+     guiApp.activateWorkbench("MaterialWorkbench");
+
     // Activate the correct workbench
     std::string start = App::Application::Config()["StartWorkbench"];
     Base::Console().Log("Init: Activating default workbench %s\n", start.c_str());