minor improvements
Moving forward ever so slowly with arriving a party
Figured out how to use action param in button_to.  so there's that
Additionally, craedPry oe fr cratingwhen the showup.
Removing parties controller (superfluous) and partway to getting button_to to return JSON
Finally got AJAX working.  Now need to add steps to put partial on screen, then let the user click on a button there to assign party to a table
Got button to return HTML partial.  Still need to bring that HTML onto page.  Separately, should probably refactor the arrival logic into party entirely (bring partial view over to party directories) for clarity and ease.