Added docstrings for the display_dict and hex_gen methods.
Added docstrings for the display_dict and hex_gen methods.

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