~/.xmonad: Make some flash videos fullscreen.

It even has a WM_ fullscreen property set, but it still doesn't work.
Also, some people don't like descriptive names.

.xmonad/xmonad.hs

        -- Ignore docks (via some WM_* attribute?)
        manageHook = composeAll [
                        className ?? (\cn -> any (cn ==) ["Skype", "Pidgin", "Geary"]) --> doF (W.shift "3"),
                        className =? "Exe" --> doFullFloat,
                        manageSpawn,
                        manageDocks,
                        fullscreenManageHook