I recently set up the GDS Way locally on a new GDS developer Macbook and
didn't have to do this. I can't see any recommendation to do this on the
Eventmachine github repo either, so I assume this issue is resolved now.

Let's remove it fo now, and if people have trouble setting it the
project up in future we can readd it.

Specifying the language in code blocks will give us some syntax
highlighting in Github.

I went with zsh because it's the default Mac terminal, the end result is
unlikely to be significantly different to bash.

Makes the link text more descriptive, so that it makes sense when read
in other contexts (e.g. a screen reader's list of links).

I just think they're neat!

Some lines were being rewrapped around column 80, some weren't, so this
commit rewraps them all for consistency.