Link does not work in docs

[whenmoon]

There is some markdown at the bottom of the readme which looks like this:

You'll also need to check out the optional steps as part of our [Receiving Messages guide](version /messaging/receiving-messages).

The link does not work.

And I have also notices one at the top:

First ensure you have followed the [initial setup guide](version /installation/initial-setup).

[mikehardy]

If you can dig up the link, there's an edit button at the top right of every page (if it's scrolled to the top) - the github UI makes doing doc patches almost trivial (it auto-forks, auto-branches for you, so the PR is clean and easy)