change laptop keybinds.

change laptop keybinds.

I used to have right and left control bound to
kp-eq & kp-mult. kp-eq i had bound to shell in emacs,
but I haven't been using shell in emacs much. kp-mult,
i think i have an xmodmap that changes it into underscore,
and that was just so I could type underscore easier. However
I find that up and down are really inconvenient to press
on the current keyboard, so instead, make those easier to
hit.