Gtk2
        * xs/GtkAdjustment.xs: add accors/mutators for struct values.
        * xs/GtkTextTag.xs: add GtkTextTagTable + some methods.
        * gtk-demo/textview.pl: fix demo to actually use unicode
          as opposed to the garbled latin1.

Glib
	* gperl.h: make it compile even on non-threaded perls (where aTHX is empty).