log in only if username and password is correct
Merge pull request #1 from csci477-team4/tanya

log in only if username and password is correct
refactored LoginActivity
Merge pull request #2 from csci477-team4/tanya

refactored LoginActivity
some pretty changes to LoginActivity
vahe: toast token upon signing in, send reset password email
pretty-fied login activity
added scrolling pictures to main dashboard
added splash screen
changed back to holo light theme
Start send text capabilities.