Hook for payment_status = Completed should be different for MassPay transactions.

[Drew Angell]

Currently, we have a hook setup for paypal_ipn_for_wordpress_payment_status_completed which works as expected.

With MassPay, though, we are sending payments out of our PayPal account instead of receiving them. MassPay comes with a payment_status, though, and when it's completed it's triggering our regular payment_status_completed hook.

The thing is, people are going want to handle MassPay completed payments differently than they would handle any other completed payment where they're receiving money.

We need to filter out the masspay transactions from our current payment_status_completed hook, and then make a new hook to be used specifically for masspay transactions' payment_status value.

[jignesh kaila]

add new payment status hook for MassPay, ref #29

→ <<cset 92448fe4d151>>

[jignesh kaila]

I am done with this issue and push to development branch.