(So Miguel told me just to go ahead and commit -kris)
* gtk/TreeSelection.custom: new file, defines a working
GetSelected method (GetSelected is a bit tricky function).
* generator/InterfaceGen.cs (Generate): also call AppendCustom
* sources/Gtk.metadata: hide the autogenerated
Gtk.TreeSelection.GetSelected method.
svn path=/trunk/gtk-sharp/; revision=8071