title: why does fineuploader's endpoint get reset to default when i initialize for the second time in an Ember app?
body: <p>bit of a specific question here since i'm using fineuploader in an ember application.</p>
  
  <p>the fineuploader s3 module is loaded in a certain route in my application.  i use the didInsertElement() callback on a View to initialize it.</p>
  
  <pre><code>didInsertElement: function() {
       window.uploader = $('#bootstrapped-fine-uploader').fineUploaderS3({
           signature: { endpoint : myendoint.com/blah }
       })
  }
  </code></pre>
  
  <p>it works fine the first time it is initialized.  but when i navigate away from that route, then come back to it, the didInsertElement() callback is invoked, however, the endpoint gets set to the default of "server/upload".  </p>
  
  <p>for those unfamiliar with Ember, when a 'Route' is navigated away from, the dom element is removed.  when you navigate back to it, the dom element is recreated from a template, then the didInsertElement callback is invoked.</p>
  
  <p>it seems like there's some instance of fineuploader that's sticking around and interfering with the re-initializing of fineuploader.  none of config options are getting set.  how can i fix this?</p>