update
Merge pull request #71 from leituo56/sammie_visualization

delete old version
Add comments to models and views
Add comments to models and views
Merge branch 'master' of https://github.com/leituo56/CMPE272-Group6 into Dev_TuoLei
Merge pull request #72 from leituo56/Dev_TuoLei

Dev tuo lei
Merge pull request #73 from leituo56/dev_jenn2

square crop of user photo on user home (style still in progress)