BF: iohub calibration for Tobii 'space' key

Associated events for space key not triggering, as key mapping was wrong
following 1.81 keyboard event changes. Specifically, key == 'space' was
being checked, when it should be  key == u' '
BF: iohub eyelink calibration mode keyboard events

Some keyboard based events not triggering during eyelink calibration
process, as some key mappings were wrong following 1.81 keyboard event
changes.