title: Create or Update - Laravel 4.1
body: <p>As there is <code>firstOrCreate()</code>
  in Laravel Eloquent, I was wondering if there was a function that could either create a record or if it exists, update the current one?</p>
  
  <p>Or would I have to write my own one?</p>
  
  <p>I wasn't able to find anything in the documentation, but it's not the first time, I've found stuff about Eloquent elsewhere than the docs.</p>