getting GC's and colors correctly -- it's not possible
to marshal arrays from C-land to mono correctly,
so indexed accessors have to be used.
svn path=/trunk/gtk-sharp/; revision=8058
* gtk/Style.custom: bind it.
* gtk/Widget.custom: bind it.
* glue/widget.c: Wrapper to fetch a GdkWindow from a widget.
* glue/style.c: wrapper routines for getting/setting the thickness
on a GtkStyle.
svn path=/trunk/gtk-sharp/; revision=7755