Modifications needed to take advantage of the split in physiq.def in LMDZ.
The old physiq.def is split in 2: a shorter physiq.def that only includes
parameters and constants needed by the parametrizations and a config.def that
includes information related to the configuration one wishes to run (e.g. orbital
parameters, gaz constants, aerosols, etc...). The output.def is also taken into account
Warning: work in progress. Probably still needs some testing. Tested on brodie for the moment