Add conda-forge packages for CoTeDe and oceansdb

[jessicaaustin]

Our team uses conda and conda-forge to manage dependencies for our python projects. Looks like neither CoTeDe nor oceansdb are in conda-forge. Looks like GSW is in there.

[castelao]

https://github.com/conda-forge/oceansdb-feedstock

https://github.com/conda-forge/cotede-feedstock