added AltkDisplay.update_area
added altk_widget_get_shape()
added the AltkEvent union
added altk_widget_event() and AltkWidget.expose_event()
added the AltkLabel class
added the AltkContainer class
added AltkContainer.add()
added the AltkBin class
added the ASSERT() macro
implemented Bin.add()
implemented AltkLabel.size_request()
fixed root_x/y in Widget.size_allocate()
typo
added AltkWidget.forall()
implemented AltkBin.forall()
added the AltkStyle class
added the AltkDrawable class
added the AltkBitmap class
added altk_bitmap_new()