Handle time zones properly

[crcastle]

The keg.io server is UTC so when I pour a beer at 5pm pacific I get an early bird badge because keg.io thinks I'm pouring a beer before noon.

[garrettpatterson]

What are we thinking? - How about having GMT offset and/or timezone as a property of the Kegerator, then each pour bases its info off of the TZ of the Kegerator it was poured from?