How do I split a contact form into multiple pages? I have a huge form that's way too large for a single page. I would like to split this form up into a few separate pages.  What are my options?

Edit: Still haven't figured out how to do this with Drupal 8.
You can use the Field Group module. This works for Drupal 7 and 8.

If you use Drush you can use the following command line.

drush dl field_group 

drush en -y field_group