~/.xmonad: add a shortcut for not.es

(aka `gol`)

@KLINGTdotNET: i'm actually using it! :)

.bin/notes

#!/bin/sh
#HOME=$HOME/.ff-notes firefox --new-instance http://not.es
#google-chrome-stable --app http://not.es
google-chrome-stable --profile-directory=Default --app-id=heaniklamgfjlgdbkmhpecgmbaoelmao

.xmonad/xmonad.hs

        ((mod4Mask .|. shiftMask, xK_b), spawnHere "firefox -private-window"),
        ((mod4Mask, xK_e), spawnHere "emacs"),
        ((mod4Mask .|. shiftMask, xK_e), spawnHere "emacs -f writeroom-mode"),
        ((mod4Mask, xK_n), spawnHere "notes"),
        ((0, xF86XK_AudioMute), spawn "amixer set Master toggle"),
        ((0, xF86XK_AudioLowerVolume), spawn "amixer set Master 5%-"),