- Document find-window.

- Document suspend-client.
- Document window-status-{attr,bg,fg}.
- Options without arguments should be listed first.
- s/Copies/Copy/.

TODO

@@ -85,7 +85,4 @@
 (hopefully) for 0.7, in no particular order:
 - key to switch to copy mode from scroll mode
 - attach should have a flag to create session if it doesn't exist
-- document suspend-client
 - document command sequences
-- document find-window
-- document window-status-{fg, bg, attr}