Unity Greeter is the greeter (login screen) that is used in Ubuntu.

Acceptance Criteria

1. Branch must compile
2. Greeter runs inside a window with unity-greeter --test-mode and animates correctly
   • Shows menubar with indicators and hostname
   • Shows Ubuntu logo
   • Shows user background with dot grid
   • Shows user list
   • Shows password entry
   • Shows gear session menu
3. Able to log in with user has a password
4. Able to log in with user that has no password
5. Able to log into guest session
6. Able to switch users