title: Use nested_form gem but show no form to begin with, only link_to_add
body: <p><a href="https://github.com/ryanb/nested_form" rel="nofollow">Nested Form</a>'s default usage is this:</p>
  
  <pre><code>&lt;%= f.fields_for :tasks do |task_form| %&gt;
    &lt;%= task_form.text_field :name %&gt;
    &lt;%= task_form.link_to_remove "Remove this task" %&gt;
  &lt;% end %&gt;
  &lt;p&gt;&lt;%= f.link_to_add "Add a task", :tasks %&gt;&lt;/p&gt;
  </code></pre>
  
  <p>But what if I want to start my view without the form – just the <code>Add a task</code> link?</p>
  
  <p>From here, it would work as normal.</p>
  
  <p>I just don't want user to see a blank nested form field when they first visit the page.</p>
  
  <p>Perhaps the solution is obvious, but I can't find it.</p>
  
  <p>Thanks for any assistance.</p>