Updated Docstrings in header and main.
Updated Docstrings in header and main.

weidnem/IntroPython2016,UWPCE-PythonCert/IntroPython2016,weidnem/IntroPython2016,UWPCE-PythonCert/IntroPython2016,UWPCE-PythonCert/IntroPython2016,weidnem/IntroPython2016