Initial code

The initial preliminary release of AC_tools.

This version was used in the preparation of various publications. Including the pre-review machine learning iodide dataset referenced below.

Sherwen, T.; Chance, R.J.; Tinel, L.; Ellis, D.; Evans, M.J.; Carpenter, L.J. (2019): Global predicted sea-surface iodide concentrations v0.0.0. Centre for Environmental Data Analysis, 08 February 2019. doi:10.5285/02c6f4eea9914e5c8a8390dd09e5709a. http://dx.doi.org/10.5285/02c6f4eea9914e5c8a8390dd09e5709a