Add years to writings and sort based on them.

site/pygame-pycairo.md

@@ -1,9 +1,12 @@
 ---
 abstract: How to combine two Pythonic graphical frameworks
+lastupdated: 2011
 ---
 
 # Combining PyGame and PyCairo
 
+*2011.  Most likely very outdated.*
+
 **Note:** See
 [http://pygame.org/wiki/CairoPygame](http://pygame.org/wiki/CairoPygame)
 for other examples.