Fixed problems of Units in data resources:
1) deleted 'kWh' from unit (same as existing 'kW.h') & adapted
definitions of factors using it ('F_CARBON_86', 'F_CARBON_87',
'F_CARBON_88', 'F_CARBON_89', 'F_CARBON_90', 'F_CARBON_91');
2) added conversion formula for units 'kW' and 'k€' (which was used in
'F_CARBON_241', 'F_CARBON_609', 'F_CARBON_610', 'F_CARBON_611');
3) added unit 'employé' (which IS NOT A UNIT!, and then has no
conversion formula).
Merge branch 'master' of https://github.com/Factor-X/awac