Update README.rst

Correct typo
Update README.txt

Update month
Update test.py

Modify to use print_function
Update codingbat.rst

Place all example function signatures and outputs into code blocks for uniformity.
Update README.txt

Update month
Update README.txt

Change month to class designation for uniformity.
Update README.txt

Replace month with class designation for uniformity.
Merge pull request #1 from jefrailey/master

Correct typos and update dates
Initial file creation for ack.py