title: jsonlite for R gives error when trying to install
body: <p>Where does one get jsonlite?  Apparently it is missing from CRAN?</p>
  
  <pre><code>&gt; install.packages('jsonlite')
  </code></pre>
  
  <p>Gives:</p>
  
  <pre><code>Installing package into ‘C:/Users/cbusch/Documents/R/win-library/3.2’
  (as ‘lib’ is unspecified)
  trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/jsonlite_0.9.20.zip'
  Warning in install.packages :
    cannot open URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/jsonlite_0.9.20.zip': HTTP status was '404 Not Found'
  Error in download.file(url, destfile, method, mode = "wb", ...) : 
    cannot open URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/jsonlite_0.9.20.zip'
  Warning in install.packages :
    download of package ‘jsonlite’ failed
  </code></pre>
  
  <p>Any suggestions?</p>