Add text to the adminDashboard indicating which conference(s) are available in offline-mode
Add a link within adminNav to enable "offline-mode"
 -  when enabled the ConfCache and RegistrationCache will retrieve their datum from the localStorage
Turning off bugsense b/c it doesn't work and it's really annoying
Answer updates should go to the local storage
 - this has what i consider an ugly hack where in showAnswer.js, there's the line
```javascript
 $scope.$parent.$parent.registration
```
to retrieve the registraiton that's in scope.  $scope.registration should traverse the
scope hierarchy to find it for me, but for some reason it's not.
Only display registrations and the ability to sync data when in offline mode.  No other options should be allowed
 - TODO: add redirects to the route controller to prevent manually going to those pages
Update server method should allow a callback to be passed in.. if not provided, a generic one is created
Add a controller method to sync up the data by iterating through the localStorage and looking for answers
 - this requires a new method called update to be added to AnswerCache b/c syncBlock was just plain annoying
Add obvious text so we know we're offline