- make event listener support multiple screens
- fix window stack to only XQueryTree the root once and then
  update the list from X events
- get rid of the junk test pop-demo.c file and come up with a real
  program
- remove some of the commented out boilerplate created from the
  object generator script
- don't repaint every window on every damage event
- advertise the _NET_WM_CM selection
- add some of the common effects found in compositing managers (drop shadows,
animations (?), support for tranlucency)