Export button

Clicking this button will convert the library from the in-memory Tree
based form to xml.

ocarina/button.py

@@ -102,6 +102,13 @@ class ClearButton(Button):
 		from ocarina import tabs
 		tabs.reset_current_page()
 
+class ExportButton(Button):
+	def __init__(self):
+		Button.__init__(self, gtk.STOCK_CONVERT, gtk.ICON_SIZE_BUTTON)
+	def clicked(self, button):
+		from libsaria import backup
+		backup.backup()
+
 class RandomButton(gtk.ToggleButton):
 	def __init__(self):
 		gtk.ToggleButton.__init__(self)