title: Problems in using lubridate library
body: <p>I installed the package lubridate.
  I got the following:</p>
  
  <pre><code>&gt; install.packages("lubridate")
  Installing package into ‘C:/Users/aw/Documents/R/win-library/3.2’
  (as ‘lib’ is unspecified)
  trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/lubridate_1.5.0.zip'
  Content type 'application/zip' length 650842 bytes (635 KB)
  downloaded 635 KB
  
  package ‘lubridate’ successfully unpacked and MD5 sums checked
  
  The downloaded binary packages are in
      C:\Users\aw\AppData\Local\Temp\RtmpuSQUFy\downloaded_packages
  </code></pre>
  
  <p>and afterwards:</p>
  
  <pre><code>&gt; library(lubridate)
  Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]) : 
    there is no package called ‘stringi’
  In addition: Warning message:
  package ‘lubridate’ was built under R version 3.2.3 
  Error: package or namespace load failed for ‘lubridate’
  </code></pre>