Desired Behaviour

Use Dask to load image file data as a delayed array which can then be formed into a delayed image stack. This would allow us to perform operations on the whole imagestack of images that is in the Live Viewer directory, without having to load all of the image data into memory.

Doing this successfully would act as a proof of principle of using Dask in Mantid Imaging.

Current Behaviour

Currently, we load data into MI image by image so only a single frame is loaded into RAM at any one time. This prevents us on performing operations where the whole imagestack is required.