+1 for what @zwn was aiming for here. Being able to simply install Postgres without configuring it would be a big win for those who just want to get going.

@seanlinsley I imagine most people won't have a local Postgres instance running. (Particularly so when running fresh from Vagrant.) Would including a small section in the README be enough for people who are already using Postgres? I don't think it'd be good to add additional steps for people who don't use Postgres regularly.