EyeLink : validate that each event type is setting the correct fields for the event type.

[isolver]

[isolver]

@pedmiston did a good test for this and found that there are some fields in the various eye tracker event types that are giving missing data when they should be able to be populated. (See the email and excel doc @pedmiston sent via email)

time, eye, gaze position stuff is all fine, which is what 99% of people use; so fixing the outstanding issues is not high priority IMO.