function that sets all standard defaults for eyelink used by Shadlen Lab
individual values can be overwritten by following calls
Assumes eyelink is already initialized.
Pass screenRect; nothing returned
John Palmer, last revised 6/6/01
6/6/01 Begun based on testcalib and testcalls
Psychtoolbox/PsychHardware/EyelinkToolbox/EyelinkDemos/notOSXed/Palmerdemo_notOSXed/seteyelinkdefaults.m