[Tails-ux] Status of the new greeter UI

Hi everybody,

We now have mockups for the greeter UI since several weeks. I think I
implemented most if not all suggestions about them.

Next steps were as far as I rember:

- paper UX testing. Tchou volunteered. Any progress?
- refined design of the UI. At least Geoffrey volunteered.
- implementation. I volunteered.

I'd really like to see us progress on that, so I can't wait to hear
from you.

Cheers