First full release

Contains basic functions for performing an atmospheric flux inversion, together with some utilities to speed that process up.

Includes:

• Yadav and Michalak (2013) Kronecker product operators
• Spectral implementation of homogeneous correlations
• Functions to help generate posterior covariances at coarser resolution

Corresponds to the published version of the JAMES paper.

Release-process check

Almost identical to RC3.
The big code change is going back to using spectral methods to describe the spatial correlations rather than a dense matrix.
All the other changes are in the docs.

Code for third subission

Implements suggestions from second round of revisions, mostly more experimental runs for different approximations for the posterior uncertainty.

Second round of revisions

Code as it existed for the second round of revisions.

Initial paper submission

Codebase at the time of the initial submission of the first paper.

This should be complete, but there may need to be a last few tweaks before the code and paper are ready.