we should add .ipynb to the gitignore - notebooks are out-of-scope for this repo. In the past we have had some notebooks be committed which adds a large volume of code to the log that is later removed

We need to make a better job of providing citation information for Fatiando components. The coolest thing I've seen so far is duecredit. We can annotate our code with references and the user can use duecredit to generate a full list of references (including external libraries).

So far a single damping factor (epsR and epsI) can be provided to pylops.avo.prestack.PrestackInversion. However as it is known that some parameters are more constrained than others in any AVO linearisation it is useful to provide different damping factors for the different parameters to invert for.

E.g.

• gradient descent with momentum
• adaptive learning rate gradient descent, e.g. AdaGrad

(Note both the links are for stochastic gradient descent, but we'd be implementing a simpler, non-stochastic one)

Won't be brilliant, but can be very informa

Describe the bug
If eps_r is shape (N,) then the fields solved are shape (N,1)

Either:

• disallow 1-D eps_r arrays
  Or:
• keep track of eps_r shape and reshape the fields to match.

Description of the desired feature

On the last community call we decided to move all sample datasets in Fatiando to Rockhound.
Harmonica datasets are being moved to Rockhound on fatiando/rockhound#84.
After it is merged, we should remove the harmonica.datasets along with the data folder. Besides, all gallery examples should download their data from Rockhound, there