bad old info in floats.in documentation

[kate]

Investigation of the step_floats.F code lead me to write some time ago:

! T Float trajectory type ! (0: neutral 3D Lagrangian, 1:isobaric, 2: isopycnal)

I'm actually not sure that's what's going on though. In any case, the documentation in the floats.in file for float type needs to be revisited.

[arango]

Actually, the distributed code is correct and has something like:

!   T      Float trajectory type (1: neutral 3D Lagrangian, 2:isobaric)

Perhaps, you skipped updating these file. Nowadays, Ftype=1 for neutral density 3D Lagrangian floats and Ftype=2 for isobaric (constant depth) floats. All the logic in step_floats.F follows this logic.

I did, however, updated the documentation of Ftype in mod_floats.F.