Added some further testing to firebaseController spec. Refactored out
extractInfinityPhotos from FirebaseController. Working on refactoring
appendExtraPhotosOnScrollEvent, renamed from prepareExtraPhotosForScrollEvent.
Refactored appendExtraPhotosOnScrollEvent to remove logic from the
controller; added new PhotoHandler function to encompass this same
logic.
Added some refactoring to firebaseController and geolocationUpdater.

Finished Jasmine testing suite on FirebaseController. Or as much as I
know we can do!
Merge pull request #53 from pocket-gophers-2014/jasmine_testing_controllers

Jasmine testing controllers