title: Can chruby and chgems replace rvm's gemset?
body: <p>I am currently using <code>rvm</code> on my development machine for switch between rubies (mainly 1.9.x and 1.8.7). Then I came across <a href="https://github.com/postmodern/chruby" rel="noreferrer"><code>chruby</code></a> and found the "Does not hook <code>cd</code>" feature attractive.</p>
  
  <p>Can <code>chruby</code> + <code>chgems</code> replace <code>rmv</code>'s gemset feature?</p>
  
  <p>Before:</p>
  
  <pre><code>$ rvm 1.8.7
  </code></pre>
  
  <p>will switch to ruby 1.8.7 with the 1.8.7 set of gems for my older rails projects. And:</p>
  
  <pre><code>$ rvm 1.9.3
  </code></pre>
  
  <p>will switch to ruby 1.9.3 with the 1.9.3 set of gems for my new rails projects.</p>
  
  <p>How can that be achived by <code>chruby</code> and <code>chgems</code>?</p>