Added Week04

.gitignore

cp/ex03/bisect.py

cp/ex04/__init__.py

cp/ex04/bug.py

cp/ex04/hangman.py

cp/ex04/mathematics.py

cp/ex04/palindrome.py

cp/ex04/parenthesis.py

cp/ex04/prefix.py

cp/project2/__init__.py

cp/project2/project2_grade.py

cp/project2/project2_tests.py

cp/project2/unitgrade_data/Hangman.pkl

cp/project2/unitgrade_data/HangmanAvailableLetters.pkl

cp/project2/unitgrade_data/HangmanGuessedWord.pkl

cp/project2/unitgrade_data/HangmanIsGuessed.pkl

cp/project2/unitgrade_data/TestBisect.pkl

cp/project2/unitgrade_data/TestIsThereARoot.pkl

cp/project2/unitgrade_data/TestTheFunctionToBisect.pkl

cp/tests/tests_week03.py