Isofit

- Small bugfixes and package management updates.
- EMIT noise and uncertainty files included
- Pressure elevation and forced nneighbors (for empirical line) options

- Topography option for forward model integrated
- new interpolation scheme in LUT
- sRTMnet related speedups
- update to surface model utility to facilitate seeding
- example updates

And more! See the [project board](https://github.com/isofit/isofit/projects/4) for more info.

Minor release:
- Updates to ray
- Bugfixes, including a major on in degree value LUTs
- Segmentation updates
- CI improvements

Minor release:
- changes download styles in imgspec routines
- bug fix in three-albedo style modtran simulation file reads

- IO code refactor (no end-use change)
- apply_oe updates for new segment sizes - now smaller, but adaptive w/ input parameter
- increased memory management and parallel efficiency
- new image cube examples
- support for in-orbit emulator runs
- support for wavelength calibration retrievals
- bibliography / bug fix / dependency updates

- Support for Ray 1.0+
- DOI assigned via Zenodo.org
- Numerous bugfixes and stability improvements