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
Remove unnecessary functions
Add function to downsample an image
Change parameter passed to function

Change parameter passed to scale_array() to correct parameter
Change function return type

Function create data_sets() now returns a tuple containing the training
and test set
Fix downsample return type
Remove unused global variable
Change list to array
Split up a function into two functions
Remove unused import statement