Merge pull request #2 from ceeeKay/master

Remove (and ignore) binary .pyc files from git
Fixing a bug that Shim Manning found.
Flooding should only happen if it's not known by the switch.
Merge branch 'master' of https://github.com/OMS6250/gt-cs6250
Fix bug identified by students and confirmed by grader Jobin.
Add file output to print_switch_tables for ease of grading