title: Change width of form semantic ui
body: <p>Hi I'm working on a project using semantic ui. I have a form, as follows:</p>
  
  <p><a href="http://jsfiddle.net/5dyzpt77/" rel="nofollow noreferrer">http://jsfiddle.net/5dyzpt77/</a></p>
  
  <pre><code>&lt;div class="content"&gt;
    &lt;div class="ui main container"&gt;
      &lt;div class="ui form"&gt;
      &lt;div class="one field"&gt;
        &lt;div class="field"&gt;
          &lt;label&gt;Email&lt;/label&gt;
          &lt;div class="one field"&gt;
            &lt;div class="field"&gt;
              &lt;input type="text"&gt;
            &lt;/div&gt;
          &lt;/div&gt;
        &lt;/div&gt;
        &lt;div class="field"&gt;
          &lt;label&gt;Address&lt;/label&gt;
           &lt;div class="three fields"&gt;
            &lt;div class="field"&gt;
              &lt;input type="text"&gt;
            &lt;/div&gt;
             &lt;div class="field"&gt;
              &lt;input type="text"&gt;
            &lt;/div&gt;
             &lt;div class="field"&gt;
              &lt;input type="text"&gt;
            &lt;/div&gt;
        &lt;/div&gt;
      &lt;/div&gt;
    &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>However I don't want the form to be full width like it is, I'd like it to be 6 columns wide, but still centered, and I'm not sure how to go about doing that. Any help would be great.</p>