An admin can view applicants/applications

* Modify admin::hall_assignment controller
* Modify admin::halls controller
* Modify routes file
* Admin::applications show
* Admin::applications new
Then here you could be doing the following

```ruby
<% @applications.each do |application| %>
 <p><%= link_to application.email, [:admin, application %></p>
<% end %>
```

Then in your `app/models/application.rb`

You'd do

```ruby
delegate :email, to: :user
```