remove redundant pkg.description

intended to be pkg.title, but title isn't a standard property in
package.json. (It's not on CommonJS spec, nor used by npm)

original issue: https://github.com/linemanjs/lineman-lib-template/pull/2
title isn't a thing
use test double's mit license
use npm/node default 'index.js' as main
clean up package.json
use grunt-release