title: knockout bind text label to dropdown value selected option text
body: <p>Is there a simple way to bind the textbox of a div to change based on the text value of the selected option in a dropdown on the same page?</p>
  
  <pre><code>&lt;div data-bind="text: dropdownValue"&gt;&lt;/div&gt;
  &lt;select&gt;
    &lt;option value="1"&gt;Value1&lt;/option&gt;
    &lt;option value="2"&gt;Value2&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>Please note, I don't want to put the values into the select element using javascript.  I'd like to bind to the value straight from the HTML.  I can also include jQuery to make it work.</p>