Created exceptions_lab module and added basic organizational structure.
Created exceptions_lab module and added basic organizational structure.

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