separated sparse array from sparse array using slices, have all tests passing, probably need more tests
merged stuff, good catch Chis. got rid of bad print statement
final session 9 presentation
Merge branch 'master' of https://github.com/UWPCE-PythonCert/IntroToPython
Merge branch 'session08' of https://github.com/UWPCE-PythonCert/IntroToPython into session08
Merge branch 'session08'