Adding pages proposed edits

The guides are great! As I was reading through I found a couple small edits that I thought I would propose. Please feel free to reject them if they are too nit-picky. 
For this, I like the original better, so please revert this change. 

I want to make sure that at this stage, we reiterate the idea that routes live in the router. There have been at least a few people on the mailing list who mentioned that they had done no web development prior to Phoenix, and I want the guides to be as helpful to them as possible.