Successful Login places user object and role string onto session
variable for validation later.
DAO interface and class for Machine.  Working for fetching machine
statuses.
Machine Status Action
Updated to add 'root' and 'nurse' users if they don't already exist.
Passwords equivalent to usernames.
Added UserName exists method for determining if username already exists
in database.
Currently working video searching, but seemingly slow. Still working on
that portion.
Merge branch 'master' of https://github.com/aabarnes/CS461ExtremeNinjas.git