Add two new configurations in IPSLCM5_WORK : EXPLANDU to activate LAND_USE in couple model (default map = 20C3M)
See http://forge.ipsl.jussieu.fr/orchidee/wiki/LandUse and test in http://dods.extra.cea.fr/data/p86manci/IPSLCM5/CM5LU2/MONITORING/
EXPBIOS to activate BIO-CHEMICAL processes (STOMATE) with Land Use 1860 map.
See test in http://dods.extra.cea.fr/data/p86manci/IPSLCM5/CM5STO/