title: Edit title slide of R Markdown Slidy Presentation
body: <p>Is there a way to edit the title slide of a R Markdown Slidy Presentation? I am able to add the header, footer, and custom css:</p>
  
  <pre><code>title: "Slidy Template"
  author: ""
  date: "June 18, 2015"
  runtime: shiny
  output: 
    slidy_presentation:
      css: ./styles/Slidy_Styles.css
      includes:
        after_body: ./styles/doc_suffix.html
        before_body: ./styles/header.html
  </code></pre>
  
  <p>But I can't figure out how to either add anything besides title, author, and date to the slide, or else replace the standard slidy title slide with a custom html template, like I do with the header and footer.</p>
  
  <p>Is there a way to do this?</p>