Uh, long comment arrives... Zoom update does not happen after editorial steps. Nodes initial color is light blue, if there is any item under them. Strange node-text relations disappeared. Initial values of new items are given now in a more common way. The wood-cutter way of handling default values of properties is now changed.

 /// The namespace of LEMON

 /// \todo Some more detailed description would be nice here.

 ///

 namespace lemon {

   /// The namespace of LEMON concepts and concept checking classes

   /// \todo Some more detailed description would be nice here.

   ///

   namespace concept {}

 }