Image shifting and saving as new dset

Created by: rajgiriUW

This came up when trying to align some images, but I didn't see anything already that resaves the shifted data. It's very simple but maybe I can just append to the old notebook about registration on the site? Or some simple function that just:

a) shifts array by specified amount b) visualize pre and post-shifting c) create a results group ("Shifted") d) write using the pos/spec of the original dataset.