title: downgrading to rails 3.2.18 from 4.1.1
body: <p>I am wondering if someone could give me some advice. I am looking to help someone out with an app thats in Rails 3 and everything i have done has been with Rails 4. How do i go about setting myself up to work on this without disrupting all my rails 4 work?</p>
  
  <p>the versions required for the project are as follows:
  Ruby version 1.9.3-p448
  Rails version 3.2.18</p>
  
  <p>The versions on my mac are 
  Ruby version ruby 2.1.1p76
  Rails version 4.1.1</p>