Add support for NOAA HYCOM THREDDS data #53
Description
The links to the THREDDS repositories for each region are listed here: https://www.ncdc.noaa.gov/data-access/model-data/model-datasets/navoceano-hycom-glb.
Example: https://www.ncei.noaa.gov/thredds-coastal/catalog/hycom_region1/catalog.html