some app.py housekeeping
blah
Merge pull request #65 from stuycs-ml7-projects/helen

Helen
fixed userExists to not accept teachers
asdf
Merge branch 'master' into oliver
Merge pull request #66 from stuycs-ml7-projects/oliver

Oliver
tiny box
tiny box
Merge branch 'master' into helen
Merge pull request #67 from stuycs-ml7-projects/shreya

I added the twilio stuff
tiny box
tiny box
Merge branch 'master' into helen
tiny Box
made changes to toString for display
changed toString again
tiny box - almost done
Merge pull request #68 from stuycs-ml7-projects/helen

basically done with tiny box!
changed toString method to fit 2 column