Fix the interpolation of wave directions in time series files

NEWS.txt

examples/tomawac/3Dcoupling/coordinate_tom.txt

examples/tomawac/3Dcoupling/fom_histcoup.slf

examples/tomawac/3Dcoupling/tom_3Dcouplittoral.cas

examples/tomawac/3Dcoupling/vnv_3d_coupling.py

sources/gaia/deall_gaia.f

sources/gaia/declarations_gaia.f

sources/gaia/gaia_init.F

sources/gaia/gaia_write_results.f

sources/gaia/point_gaia.f

sources/tomawac/deall_tomawac.f

sources/tomawac/declarations_tomawac.f

sources/tomawac/point_tomawac.f

sources/tomawac/wac.F

sources/tomawac/wac_init.F

sources/utils/bief/out_history.F90