Add autoload cookie to global-ethan-wspace-mode and random whitespace

Relax! j/k about the whitespace.

The autoload cookie is necessary so we can run `global-ethan-wspace-mode` without an explicit `require`.

I also took the libert of submitting a recipe for ethan-wspace to Melpa, if you have this package repository configured you can just do `M-x package-install ethan-wspace` and you're good to go.