title: Change only one view on state change in ui.router?
body: <p>I have a simple layout like so:</p>
  
  <pre><code>__________________  ________
  |                |  | Side |
  |  Main section  |  | -bar |
  |________________|  |______|
  </code></pre>
  
  <p>The "Main section" exposes forms to the user; based on their selection that "Main section" <code>state</code> should change (i.e.: a different partial should be loaded). How do I facilitate this with <code>UI.router</code>?</p>
  
  <p>E.g.: change only <code>columnOne</code> in the <code>/about</code> state: <a href="http://plnkr.co/edit/IzimSVsstarlFviAm7S7">http://plnkr.co/edit/IzimSVsstarlFviAm7S7</a></p>