Fixes #232.
Merge pull request #234 from AshFurrow/mixup

@orta => Fixes #232.
turn off bid buttons when offline
Merge branch 'master' of https://github.com/artsy/eidolon into location
Merge pull request #239 from orta/location

@ashfurrow => Use Reachabilty to disable bid / registration buttons
support offline mode
add the sale_id to PIN based auth
Merge pull request #257 from orta/auction_to_pin_auth

@ashfurrow => Auction to pin auth