Addition of CCs/Bank accounts even if form elements not present on page load.

If the form elements for adding bank accounts or credit cards are added to the DOM after initial page load (ie AJAX) the submit button is not present to attach .click() and trigger the calls to balanced.

Fixed by moving each file into their own function, called by a jQuery .on handler on the submit button class which must exist.

Allows the addition of either bank accounts/credit cards even if the form is added after initial page load.
@dotmartyr I hear ya, all right, so you want me to merge this in and update the gem?