title: ggplot2: How to adjust fill colour in a boxplot (and change legend text)?
body: <p>How can I:</p>
  
  <ol>
  <li>Set the fill colors in the boxplot below? I tried the argument "colour" but that failed.</li>
  <li><p>Change the legend text from "0", "1" to something else?</p>
  
  <pre><code>require(ggplot2)
  ggplot(mtcars, aes(factor(cyl), mpg)) +
      geom_boxplot(aes(fill=factor(vs), colour=c("grey50", "white")))
  </code></pre></li>
  </ol>