Feature request: Magnetic signals

[joseph-tharayil]

I have heard interest in using BlueRecording to calculate MEG signals in addition to electric signals. I think this should be fairly straightforward to implement, so I'm opening an issue here to remind myself of it.

[joseph-tharayil]

On reflection, this is much more complicated than anticipated. We would need to output the vector B field, not just its magnitude. This would require a vector coefficient file, which in turn would require changes to how neuron and neurodamus output the report.

[joseph-tharayil]

A workaround would be to just report on the three components of the vector separately. I’ve started implementing this at https://github.com/joseph-tharayil/BlueRecording/tree/feature/magneticRecording