Remove images
Add images for Aleph and Bet
Move sections of code into function
Add dictionary with first to letters
Add function to convert an image to a numpy array
Add function to scale a numpy array
Add funtion to create datasets from images

Function create_datasets creates a training and test list from the
images in images/.
Add function to preprocess images
Move images to test/ and /train
Modify function that processes images
Merge branch 'read_data' into develop