Add Board Members to the standard report

Still needs tests.
Actually I think all that logic cause it will probably involve parsing the bisnode_board_member object should maybe be on a classmethod on the BisnodeBoardMember model to avoid having the this models have to know the implementation details of the BoardMember model.

I just started reading Practical Object-Oriented Design in Ruby http://www.poodr.com/ which I highly recommend so far. (The Ruby aspect is not relevant.)