Why are we installing in section 5?

What's going on that [we don't have people installing dat until section 5](https://github.com/maxogden/get-dat/blob/master/markdown/05-dat-clone.md#cloning-a-clone)? That's [literally the first thing that we told them to do](https://github.com/maxogden/get-dat/blob/master/readme.md), so I don't get why they're doing it again. Am I missing something?
