ClimaCoupler Parameters

[kmdeck]

Currently, the bucket model and clima atmos make their own parameter structs. There are common parameters between them, though, that could be overwritten (e.g. clima atmos decides to simulate a different planet and set g = some other value). To avoid that, the coupler should be the one making the param structs (ideally by collecting all params needed and then making the atmos and land param structs) in coupled sims.

[LenkaNovak]

Also to address #72