add Trevor Turk code for remote url upload
rolled back to Paperclip 2.8
changed Paperclip Gem to grab latest from git
changed 'image_url' to 'remote_image_url' in controller and form
changed local methods that still pointed to 'image_url' rather than 'remote_image_url'
added S3 credentials to Config file rather than 'has_attached' method
Fixed S3 credentials
corrected name of column in db
missing 'end' in production.rb
fixed remote image URL with new controller, and created a Gist to save the working code