Update layout

This is really minor, but since the later versions of Ruby/Rails use the `{a: b}` syntax for hashes, I wonder if there is a preferred way to set these routes up; the only thing I could find was on the Rails Routes page (http://edgeguides.rubyonrails.org/routing.html) where they use something like: 

```
get 'profile', to: 'users#show'
```