ALMA Logo tutorial upgrades

[iancze]

Is your feature request related to a problem or opportunity? Please describe.
There are several features that we are/will be exploring for the HD 143006 dataset (#62 , #63 ) which probably make sense to develop for the ALMA logo dataset as well. These features could be inserted by expanding some of the existing tutorials.

Some features/discussions worthwhile adding:

• Visualizing the Fourier plane of the resulting ALMA logo cubes
• "Production-Ready" Python scripts in an example folder corresponding to the Logo cube
• New priors for imaging. In particular, total squared variation, entropy, and power spectrum prior.
• Robust exploration of cross-validation parameter ranges. Can we do better than the existing image?
• A better discussion and exploration of how regularizer "losses" change during training. Can we include this as part of a tensorboard visualization?

Most likely these stubs will need to be further developed and sorted into new issues---this is just a conversation starter.

[iancze]

Superseded by #251