Bespoke Car Campaign page

![0 1-carcampaign-320-agc](https://cloud.githubusercontent.com/assets/1579511/3522316/3ed55aae-074b-11e4-83f1-6ce281701a9e.jpg)
![0 1-carcampaign-1160-agc](https://cloud.githubusercontent.com/assets/1579511/3522317/3ed79fe4-074b-11e4-8992-9d66009302ec.jpg)

Given that we have a very deliberate `CarCampaignsController` we should follow that convention with I18n naming and have a `car_campaigns` namespace not `campaigns.car`.

You can also use lazy lookups in your views and let Rails infer the path to the key from the view structure.

e.g. `<%= t(".title") %>` instead of `<%= t("campaigns.car.title") %>` given a key of `car_campaigns.show.title` not `campaigns.car.title`.