Revision 5

Created module from included file parafilt.
Converted caldyn0 to free format.
Added a rule to create cross-references with NAG.
Added optional attribute in iniadvtrac.
Suppressed argument nq in dynredem0 and dynredem1, using nqmx instead.
Replaced some NetCDF calls by netcdf95 calls in dynredem0.
Added intent attribute in dynredem0 and dynredem1.
Annotated use statements with only clause, in dynredem1.
Suppressed variable nq and argument of iniadvtrac in etat0.
Added test on nqmx in etat0.