allow passing of filename to Upload from Attachment

Author: steved

lib/zendesk_api/resources/misc.rb

@@ -34,7 +34,7 @@ def initialize(client, attributes)
  end
 
  def save
- upload = Upload.create!(@client, :file => file)
+ upload = Upload.create!(@client, attributes)
  self.token = upload.token
  end