Adds delete (forever\!) button to item
Splits js into two files
Fixes some unintentional global vars
Splits js into even more files
Fixes mistaken variable name change.
Adds reminder handler
Just kidding! That last emergency commit was broken.

Correctly assigns reminder params in the proper format so it will
get parsed as a nested attribute of item.
Does reminder creation not using nested attrs

Reminders gets its own nested route inside item, and reminder's js
handler submits an ajax request to it.