Merged in bugfix/no-netcdf-tests (pull request #43)
Skip `gs2_diagnostics_new` and `cyclone_itg_replay` tests when building without netcdf and new diagnostics
Skip gs2_init when building without netcdf
gs2_init
Skip unit_tests/nonlinear and nonlinear_tests/cyclone_itg when building without FFT
unit_tests/nonlinear
nonlinear_tests/cyclone_itg
Skip `gs2_diagnostics_new` and `cyclone_itg_replay` tests when building without netcdf and new diagnostics
Skip
gs2_initwhen building without netcdfSkip
unit_tests/nonlinearandnonlinear_tests/cyclone_itgwhen building without FFT