Rename author 'S.E. Wijffels' to 'Susan Wijffels'

This author contributed to an AR<=3 for CSIRO:
http://www.csiro.au/Organisation-Structure/Divisions/Marine--Atmospheric-Research/NobelPeacePrizeWinners.aspx

This matches 'S.E. Wijffels' in AR3 WGI Ch7.
The name 'Susan Wijffels' appears in AR5.