Detect if BIN or Auction and capture number of bids

[driscoll42]

Is your feature request related to a problem? Please describe. It would be interesting to capture if a listing is a Buy It Now or Auction listing and if Auction how many bids were on it.

Describe the solution you'd like Another two columns on the df for "Listing Type" and "Number of Bids" where if BIN the latter should be 0. Really we could get away with just one column as all BIN will have 0 bids and all auctions will have at least one, but I think that'll confuse some people.