Revert "Disable AJAX form updates"

This reverts commit 83b191c69496e73f7c36ceeac0248e07a5d8877d.
Fix incorrect applicant form partial path
Only update the current applicant in ApplicantController#update

Ignore :id.
Avoid form update refreshes with AJAX
Merge pull request #73 from jrunningen/master

Use AJAX to update the main form without page refreshes