Squash DeprecationWarnings

[kdwyer]

$ python -Wall xpn.py -c .
/home/kev/projects/xpn/xpn_src/Article_Pane.py:410: DeprecationWarning: Use the new widget gtk.Tooltip
self.expander_tooltip=gtk.Tooltips()
/home/kev/projects/xpn/xpn_src/Article_Pane.py:413: DeprecationWarning: Use the new widget gtk.Tooltip
self.expander_tooltip.set_tip(self.expander,_("Hide Headers"))

** (xpn.py:1377): WARNING **: expected enumeration type GtkToolbarStyle, but got GtkShadowType instead

** (xpn.py:1377): WARNING **: expected enumeration type GtkToolbarStyle, but got GtkShadowType instead
xpn.py:2786: DeprecationWarning: Use the new widget gtk.Tooltip
zoom_article_tip=gtk.Tooltips()
xpn.py:2787: DeprecationWarning: Use the new widget gtk.Tooltip
zoom_threads_tip=gtk.Tooltips()
xpn.py:2788: DeprecationWarning: Use the new widget gtk.Tooltip
zoom_groups_tip=gtk.Tooltips()
xpn.py:2789: DeprecationWarning: Use the new widget gtk.Tooltip
zoom_article_tip.set_tip(self.zoom_article_button,("Zoom Article Pane"))
xpn.py:2790: DeprecationWarning: Use the new widget gtk.Tooltip
zoom_threads_tip.set_tip(self.zoom_threads_button,("Zoom Headers Pane"))
xpn.py:2791: DeprecationWarning: Use the new widget gtk.Tooltip
zoom_groups_tip.set_tip(self.zoom_groups_button,_("Zoom Groups Pane"))
/home/kev/projects/xpn/xpn_src/Dialogs.py:44: DeprecationWarning: use set_markup() instead
self.dialog.label.set_use_markup(True)