passing test for adding in a slice longer than advertised. probably could use some refactoring
cleaned up session 09 and added ipython log.
Merge branch 'master' of https://github.com/UWPCE-PythonCert/IntroToPython
Merge branch 'master' of https://github.com/UWPCE-PythonCert/IntroToPython
Added Week 9 notes