Add license to all software files

[thomas-robinson]

The license information needs to be added to the files. We use the LGPL. Here is an example from our FMS code: https://github.com/NOAA-GFDL/FMS/blob/master/constants/constants.F90#L1

@diyorzakirov07 please add this to the current scripts in the repo.

[thomas-robinson]

@diyorzakirov07 make sure you do this on a different branch.