v0.5.7

ClimaSeaIce v0.5.7

Diff since v0.5.6

Merged pull requests:

• [codex] Improve docs references and public docstrings (#161) (@navidcy)
• Update README + docs landing page (#162) (@navidcy)
• Fix rendering in the Docs/Layered snow + ice section (#163) (@navidcy)
• (0.6.0) Add thermodynamics mass fluxes (#166) (@simone-silvestri)
• (0.5.7) bump version (#167) (@simone-silvestri)