Adding Lecture 5

cs171/Lect05/addodds.py

cs171/Lect05/for_range.py

cs171/Lect05/hangman.py

cs171/Lect05/hello.py

cs171/Lect05/set_iteration.py

cs171/Lect05/stairs.py

cs172/Lect05/bubble.py

cs172/Lect05/bubble_bounce.py

cs172/Lect05/bubbles.py

cs172/Lect05/dragon_drop.py

cs172/Lect05/drawable.py

cs172/Lect05/hello.py

cs172/Lect05/target.py