title: spawn ENOENT error
body: <p>I'm trying to upload stuff to amazon s3 with the imager module. I keep getting the error message that says,</p>
  
  <pre><code>events.js:72
      throw er; // Unhandled 'error' event
                ^
  Error: spawn ENOENT
      at errnoException (child_process.js:980:11)
      at Process.ChildProcess._handle.onexit (child_process.js:771:34)
  </code></pre>
  
  <p>I've already installed imagemagick on my computer, but it keeps saying it's unlinked, could this be the problem? I also tried linking using brew link imagemagick, but it's unable to link for some reason. I'm using OSx. Any fixes?</p>
  
  <p>Thanks.</p>