added Database instance variable
no progress
Merge branch 'databasetest' of github.com:duke-compsci308-spring2013/vooga into ArcadeModel
fixed bug in authenticateUsernameAndPassword -- now password is actually being authenticated
implemented login, still need register
Merge branch 'ArcadeModel' of github.com:duke-compsci308-spring2013/vooga into databasetest
model and database are now connected in that the username and password must match up to be able to login