Adding preamble to eyelink file. -MT

SaccadePursuitEyeTracking.py

@@ -235,6 +235,7 @@ class EyeTrackingSaccadePursuit(SaccadePursuit.SPtask):
             )
             self.tracker.initialize_graphics()
             self.tracker.open_edf()
+            self.tracker.sendCommand("add_file_preamble_text 'Saccade Pursuit Experiment Plus Fixation and Necker Cube'")
             self.tracker.initialize_tracker()
             self.tracker.send_calibration_settings()