Show more percentage + big bubbles on pour
Be less obnoxious about active pour
Add capability for a pouring event

this will let us know how much is leaving the keg in real-time *during*
the pour (if we want)
Make the admin part look less horrific
Add fake pour buttons in admin

They follow the same API as the Netduino will: 1 StartPour when pressed,
0-N Pouring while button held down, 1 StopPour when button released.