title: R update from 3.0 to 3.1 but all packages remain in 3.0
body: <p>I'm using Ubuntu, and in my home folder there is <code>~/R/i686-library/R/3.0</code> and <code>/3.1</code>. My current R version is 3.1, but all of my packages remain in 3.0. Is it possible to just copy paste libraries from 3.0 to 3.1?</p>
  
  <p>Also, what's the best way to update / migrate package when I upgrade R?</p>