Merged changset [7432] from ORCHIDEE_2_2 into the trunk, see ticket #821 :
Changes to make the IMPOSE_SOILT mode functional. This mode is not anymore dependent on IMPOSE_VEG, so we can impose soil
properties even when we read a vegetation map. A new output variable is added to export "ksref" before being vertically modified.
Merge done by Bertrand Guenet.