Lower the barrier to entry for setting up model grids: supplying a mini-grid or "tutorial grid"

[gully]

In addition to lowering the barrier to downloading and setting up the whole grid (#26), we also want to make the downloading extremely fast for quick-look purposes. It may therefore be useful to provide a decimated grid, truncated in wavelength extents, reduced resolution, reduced parameter ranges, but with all of the available dimensions to facilitate the dashboard.

Luckily, this grid may also have significant scientific potential: It could represent low res spectra across the IJHK bands, for instance, and therefore be useful outside the context of fitting high resolution spectra.

So making this grid is a win-win from an engineering and science standpoint, and may therefore be worth doing.