Week4

Per section 4.5.3 of http://guides.rubyonrails.org/action_controller_overview.html, this style of strong parameters is provided so you can use it in the `new` action.  You should use the `require` style unless you cannot because you are using the strong params method in a `new` action.  Anytime data absolutely has to be present for your code to work properly, you need to use `require`.  In order to create your `Friendship` you need that data.