A paginated list of contacts will be returned to you, with a maximum of 100 contacts per page.
Please Note: There are 2 fields here to pay close attention to: the "has-more" field that will let you know
whether there are more contacts that you can pull from this portal, and the "vid-offset" field which will let
you know where you are in the list of contacts. You can then use the "vid-offset" field in the "vidOffset"
parameter described below.
See also:
http://developers.hubspot.com/docs/methods/contacts/get_contacts