Updated Doctrings for main and overall program description.
Updated Doctrings for main and overall program description.

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