title: Automate RStudio processed RMarkdown?
body: <p>I have an RMarkdown file that I use to generate a nice HTML report.
  The problem is, I want to be able to automate it so that it can run on a headless server. As such there will be nobody there to start Rstudio and press the 'knithtml' button and it seems that Rstudio is doing a LOT of additional magic like having it's own version of pandoc, running all the necessary commands, applying css styles etc.</p>
  
  <p>How can I take this report and generate the same thing Rstudio is generating when I press the 'knithtml' button, but by just running an R script?</p>
  
  <p>Thanks.</p>