title: Installing dplyr gives me older version
body: <p>I am trying to install the latest <code>dplyr</code> (version 0.4.1) . But every attempt of <code>install.packages("dplyr")</code> over several different days result in version 0.2 installed.</p>
  
  <pre><code>&gt; install.packages("dplyr")
  Installing package into ‘C:/Users/Ricky/Documents/R/win-library/3.1’
  (as ‘lib’ is unspecified)
  trying URL 'http://mran.revolutionanalytics.com/snapshot/2014-10-01/bin/windows/contrib/3.1/dplyr_0.2.zip'
  Content type 'application/zip' length 2235535 bytes (2.1 Mb)
  opened URL
  downloaded 2.1 Mb
  </code></pre>
  
  <p>Is there any step I'm missing? Is this peculiar to Revolution Analytics user?</p>
  
  <p>Session info below in case of use.</p>
  
  <pre><code>&gt; sessionInfo()
  R version 3.1.1 (2014-07-10)
  Platform: x86_64-w64-mingw32/x64 (64-bit)
  
  locale:
  [1] LC_COLLATE=English_Singapore.1252  LC_CTYPE=English_Singapore.1252    LC_MONETARY=English_Singapore.1252
  [4] LC_NUMERIC=C                       LC_TIME=English_Singapore.1252    
  
  attached base packages:
  [1] stats     graphics  grDevices utils     datasets  methods   base     
  
  other attached packages:
  [1] devtools_1.6
  
  loaded via a namespace (and not attached):
  [1] tools_3.1.1
  </code></pre>
  
  <p><strong>Edit:</strong> <code>.libPaths()</code> output added</p>
  
  <pre><code>&gt; .libPaths()
  [1] "C:/Users/Ricky/Documents/R/win-library/3.1" "C:/Program Files/RRO/R-3.1.2/library" 
  </code></pre>