title: Customise carrierwave validation messages
body: <p>carrierwave is giving me this validation error:</p>
  
  <blockquote>
    <p>Image You are not allowed to upload "pages" files, allowed types: jpg,
    jpeg, gif, png</p>
  </blockquote>
  
  <p>any idea how to remove the "image" attribute bit from the beginning? it doesn't read very well.</p>