Automatic image registration

[sumanthratna]

The DH mask that @jlevy44 sent me seems to be misaligned by a few pixels from its corresponding image. We could add a CLI feature flag to use MixMatch to register before rendering, or we could use https://github.com/BrancoLab/imgreg2D.

[jlevy44]

I like the mixmatch idea, we definitely need to patch that repo to get it fully functional.

[sumanthratna]

Great! Given two images, is there a way to estimate which of the 6 transforms will work best? This would be a nice feature to have, but on the other hand, I'm not sure if this is worth the performance decrease.

If this doesn't work out, we can just make the CLI option a choice of ['none', 'affine', 'bspline', ...]