updated rescaling: only for retrospective scenarios

this doesn't actually change the scores since Japan 2010 is the max:

eez2014 pressures scores for 30 regions are rescaled to the max harvest since eez2012 (2010-2012):
Japan in 2010: 7489 marine mammals and sea turtles harvested

eez2013 pressures scores for 29 regions are rescaled to the max harvest since eez2012 (2010-2011):
Japan in 2010: 7489 marine mammals and sea turtles harvested

eez2012 pressures scores for 22 regions are rescaled to the max harvest since eez2012 (2010-2010):
Japan in 2010: 7489 marine mammals and sea turtles harvested