title: Change logo in transactional email
body: <p>I have a transactional email with the following code:</p>
  
  <pre><code>&lt;a href="{{store url=""}}"&gt;&lt;img src="{{var logo_url}}" alt="{{var logo_alt}}" style="margin-bottom:10px;" border="0"/&gt;&lt;/a&gt;&lt;/td&gt;
  </code></pre>
  
  <p>and a logo in /public_html/skin/frontend/fortis/default/images
  called logo.png
  What I should put in store url="" and in {{var logo_url}} to show my logo in the transactional email?</p>