title: How force papertrail to store an object with only meta data
body: <p>I've looked in to <a href="https://github.com/airblade/paper_trail#storing-metadata" rel="nofollow">how to store meta data for a paper trail versioned object</a> and it seems easy enough.  Problem is I want to be able to store that meta data without making any actual changes to the object.  Calling .save or .touch or just using .update_attributes!(:updated_at => Time.now) doesn't create a new version.</p>
  
  <p>Anyone know a way to force paper trail to store a version that doesn't have any changes but has meta data?</p>