title: Link to vignette from readme.rda
body: <p>I am building an R package. I have several vignettes that I would like to include links to in my README.Rmd. </p>
  
  <p>I know that vignettes are to be built optionally when installing the package. </p>
  
  <p>I do not really understand where I should start. I am in the process of building the package in R studio. I would the user to be able to see the vignette just by clicking at link in the readme on GitHub. Is this possible? How?</p>
  
  <p>The following obviously does not work. </p>
  
  <pre><code>[The main vignette](vignettes/Vignette.html)
  </code></pre>