Use opendiff for merging

Signed-off-by: Christian Romney <cromney@pointslope.com>
Added racket and some shell completion

Signed-off-by: Christian Romney <cromney@pointslope.com>
Don't source completion here

Signed-off-by: Christian Romney <cromney@pointslope.com>
First install prelude then stow emacs

Signed-off-by: Christian Romney <cromney@pointslope.com>