Frequent Cron Runs Create Duplicate Recurring Payments

The following changes have been made and committed to devel:

* Process each recurring profile once per day, rather than some combination of every cron run (order creation) and never (profiles deactivated through manager.paypal.com)
* Update the pnref to use the most recent payment (original is stored in a separate column already)
* Only do order processing if a new payment was found

I'm not 100% sure that recurring payments that fail will be handled gracefully. There are multiple status code fields, and I can't easily tell how failed payments will come back through the web service. I'm planning on adding more info to the order / payment comment to track this.

Additional logging is now in place.

Fixed in 6.x-1.2