title: Errors in christopher gandrud's book reproduction from github in rstudio
body: <p>I downloaded the repository of new book reproducible research with r and rstudio from github page of christopher gandrud. Even after following the instructions, I am getting following error when I run knit2pdf in bookmake.R file:</p>
  
  <pre><code>running: "sh"  -c "pandoc Children/FrontMatter/StylisticConventions.md -t latex -o StyleTemp.tex"
  Quitting from lines 99-100 (Rep-Res-Parent.Rnw) 
  Error in system(cmd, intern = TRUE) : '"sh"' not found﻿
  </code></pre>
  
  <p>How can I resolve  this?</p>