add image stiching to exploration notebook

add notebook to be able to evaluate more models

add better contour plot using argmin and abs

add contour images to notebook

add drawing heatmap of example focus stack

add gpu support to notebook

add example images to notebook

rerun notebook with latest model

readd cod modifications

added in_memory loading to reduce disk reads and increase speed

add testing notebook for convolutional neural network

cleanup to make ready as submodule