title: Spork: how to refresh validations and other code?
body: <p>I've been using spork all day, and most of the time it is a really great.</p>
  
  <p>However, I am often running into a few problems where I need to restart Spork in order for my tests to pass... and now I'm wondering if it's more trouble than it's worth. I am new at ruby, so sometimes I can't predict if the error is due to a refresh problem, or if the error is due to my unfamiliarity with Ruby and Rails.</p>
  
  <p>What do I need to put into Spork.each_run block so that my validations and other things are refreshed so that I don't have to restart the spork server?</p>
  
  <p>Thanks</p>