Balanced URL changed again?

The values being returned from Postgres for

    SELECT balanced_customer_href FROM participants ...

have changed. This commit adjusts the Gittip code to use these new values correctly.

Um, how the hell does this happen?

When I store a value in a persistent store, such as a database, I expect that value to stay there until some event occurs to change it. Looking `balanced_customer_href` for myself, I see that the value has changed. I, as a Gittip user, have not changed my credit card info in well over a year.

At a very high level, this is what scares me the most about the Gittip architecture. We do not treat data as something to be saved. Our data changes all the time and we have only occasional bits of tracking and history to know what changed when and why. This is the main thing preventing me from contributing more to Gittip. I do not want to add to the mess.