MOD: Fortran wrappers

Since I changed some of the function names in the Fortran source, I also
needed to remake the Fortran wrapper files with F2PY.
BUG: fixed several minor bugs

This commit fixes several minor bugs. I expected this after the numerous
modifications I recently made to winds.py. I am currently testing
whether the impermeability strong constraint is working as expected, and
there may be some additional commits if I find that this is not working
properly...