Gtk-D API Documentation now on dpldocs.info

[Adam D. Ruppe]

Compare and contrast to the official gtk-d docs:

https://api.gtkd.org/gtkd/gtk/AboutDialog.html

and the C gtk docs:

https://developer.gnome.org/gtk3/stable/GtkApplication.html


You can see they are all generated from the same source doc 
comments, but I think mine is nicest - just translating the links 
into the D names helps. Even if you can do it in your head once 
you get to know the pattern, having clicks just work to get you 
there are nice.