Read HVD balances from BART

[gergles]

It would be awesome if Farebot could parse out the BART HVD purses stored on Clipper cards, and to identify transactions debiting from that purse separately in the UI.

Currently HVD transactions and refills are just lumped in with cash, which makes it very difficult to figure out what the current state of all the 'buckets' on a card is.

I can provide a dump with these transactions/this purse, just message me.

[phcoder]

I would be interested in your dumps. Obviously no promises.