Changes made by Taiwon Chung (taichung2014@u.northwestern.edu). Version: 0.01
Changes made by Taiwon Chung (taichung2014@u.northwestern.edu).
Changes made by Taiwon Chung (taichung2014@u.northwestern.edu). fixed login, worked on register (not finished)
Changes made by Taiwon Chung (taichung2014@u.northwestern.edu). completed login, register; started weight ui