demo for a simple gaze recording experiment
created after SAMPLE EXPERIMENT FOR MACINTOSH, by Dave Stampe , 27 June '97
15-05-01 fwc created first version
22-05-01 fwc debugging with working eyelink.mex
02-06-01 fwc removed use of global el, as suggest by John Palmer.
Psychtoolbox/PsychHardware/EyelinkToolbox/EyelinkDemos/notOSXed/EyelinkDemoExperiment_notOSXed/simpletrialdemo.m