Add faraday rotation and tests

...est_data/L570745_SB001_uv_CORRECTED_DATA.MS/table.f7_TSM0

...r/test_data/L570745_SB001_uv_CORRECTED_DATA.MS/table.info

...r/test_data/L570745_SB001_uv_CORRECTED_DATA.MS/table.lock

...data/L570745_SB002_uv_CORRECTED_DATA.MS/ANTENNA/table.dat

..._data/L570745_SB002_uv_CORRECTED_DATA.MS/ANTENNA/table.f0

...ata/L570745_SB002_uv_CORRECTED_DATA.MS/ANTENNA/table.info

...ata/L570745_SB002_uv_CORRECTED_DATA.MS/ANTENNA/table.lock

...745_SB002_uv_CORRECTED_DATA.MS/DATA_DESCRIPTION/table.dat

...0745_SB002_uv_CORRECTED_DATA.MS/DATA_DESCRIPTION/table.f0

...45_SB002_uv_CORRECTED_DATA.MS/DATA_DESCRIPTION/table.info

...45_SB002_uv_CORRECTED_DATA.MS/DATA_DESCRIPTION/table.lock

...st_data/L570745_SB002_uv_CORRECTED_DATA.MS/FEED/table.dat

...est_data/L570745_SB002_uv_CORRECTED_DATA.MS/FEED/table.f0

...st_data/L570745_SB002_uv_CORRECTED_DATA.MS/FEED/table.f0i

...t_data/L570745_SB002_uv_CORRECTED_DATA.MS/FEED/table.info

...t_data/L570745_SB002_uv_CORRECTED_DATA.MS/FEED/table.lock

...t_data/L570745_SB002_uv_CORRECTED_DATA.MS/FIELD/table.dat

...st_data/L570745_SB002_uv_CORRECTED_DATA.MS/FIELD/table.f0

...t_data/L570745_SB002_uv_CORRECTED_DATA.MS/FIELD/table.f0i

..._data/L570745_SB002_uv_CORRECTED_DATA.MS/FIELD/table.info