title: Configure the label of Active Admin has_many
body: <p>Well I have a two models related with a on-to-many assoc.</p>
  
  <pre><code>#models/outline.rb
      class Outline &lt; ActiveRecord::Base
        has_many :documents
      end
  
  #models/document.rb
      class Document &lt; ActiveRecord::Base
        belongs_to :outline
      end
  
  #admin/outlines.rb
      ActiveAdmin.register Outline do
        form do |f|
          f.inputs "Details" do
            f.input :name, :required =&gt; true
            f.input :pages, :required =&gt; true
            ...
            f.buttons
          end
          f.inputs "Document Versions" do 
            f.has_many :documents, :name =&gt; "Document Versions"  do |d|
              d.input :file, :as =&gt; :file
              d.buttons do
                d.commit_button :title =&gt; "Add new Document Version"
              end
            end
          end
        end
      end
  </code></pre>
  
  <p>Well as you can see in the admin/outlines.rb I already tried setting up the :name, in the has_many :documents, and the :title in the commit_button, but neither of that options work, I also tried with :legend, :title, and :label, instead of :name in the .has_many. Not working.</p>
  
  <p>This is the result of that code:
  <a href="http://imageshack.us/photo/my-images/696/screenshotoyt.png">Screenshot</a></p>
  
  <p>What I want to display is "Document Versions" instead of "Documents", and "Add new Document Version" instead of "Add new Document"</p>
  
  <p>If someone can have a solution it would be great </p>