So the way it works now is when you go to sign up on community, it goes to https://manage.opscode.com/signup?ref=community which lets you create an account then takes you to a page in hosted where you can get your key and links back to community.

We can probably do the same thing and have separate links for sign in and sign up when you're not logged in. (making a `sign_up_url` helper pointing to that URL (which you could customize if running against EC.))

In the very long term we might move all the sign up logic that's now on manage in to oc-id, but that should not be considered here.