.sawfishrc: allow to send keys to gnome windows using xdotool
.sawfishrc: allow the menu key to be invoked
bin/download-today: fix error
doc/sawfish.ahk: do not pop the start menu
doc/sawfish.ahk: allow menu key to be sent
doc/sawfish.ahk: fix key should be enclosed with {}
etc/.Xmodmap-t430: add comments, fix escape/lock

Signed-off-by: Bao Haojun <baohaojun@gmail.com>