GtkD: Dead or Alive?

[dsimcha]

I've been using GtkD for my Plot2kill plotting library, and overall it 
appears to be the most mature D GUI library available.  However, I've 
noticed that no commits have taken place for several months, and nobody 
seems to want to test the 64-bit support patch I submitted.

Is the lack of GtkD activity because the project is mature and not much 
still needs to be done, or because GtkD has been abandoned?