AllBikesLocation is changed to a static class.
All the methods associated with database-lookup are converted into extension methods on Database.
GetBikesNearby uses AllBikesLocation.GetBikeLocations to get most recent bike locations.
Added db context to db method calls in test
Removed old and unused tests
Removed unused unit test as result of refactor
Merge branch 'refactordbcalls#21'