Update the list of grouping options

This is the list of grouping options selected for the initial
version "V0" of the tool.
Add new and updated data
Rename category for Cumulated WG in AR

I added 'cumulated-' at the start of the name in the new set
of exported data.
Load the list of assessment report years
Merge branch 'master' of github.com:medea-project/ipcc.projetmedea.fr

Conflicts:
	data/role-categories.js
	data/role-in-working-group-categories.js
	index.html