Added the functionality that was necessary to create a data frame of the delays. Will currently only work for NW because of has_shadow property.

Adapted the return statement to fill a dictionary with the results and removed the print statements.

Updated controller method read_folders as there was currently no need for checking csv. Now this is done somewhere else

Changed the star to + as a key of 7 and 17 could be mixed up. Now that should not be possible anymore.

When testing, some mistakes arose in the regex, I revised them and they seem to function correctly unless a file is read, something is still wrong there.

Adapted the read folders function as that was the one that was called right now to more suit the wrapper class.