The part of spiralmoments that allows to read-in velocity field data and rotate/project it should also be ported. It should be easy for the user to generate a peak-velocity map prediction by having spiralmoments call wakeflow for them, or similar. This will likely require #26 to be completed first.

After this, the README should be updated to reflect the fact that spiralmoments has been ported completely. A Jupyter notebook with examples should also be added to the docs.