improve the class

.envrc

.gitignore

Makefile

README.md

data/english_wuthering_heights.txt

data/french_madame_bovary.txt

data/german_kritik_der_reinen_vernunft.txt

data/spanish_don_quijote.txt

dev-requirements.txt

requirements.txt

src/__init__.py

src/arithmetic_coding.py

src/huffman.py

src/occurrenceFrequencies.py

src/occurrence_frequencies.py

tests/__init__.py

tests/constants.py

tests/empty.txt

tests/multiline.txt

tests/sample.txt