initial checkin
Rename batch to single_notifier
Reorganise spec_helper
Use simplecov's rcov formatter for Jenkins
Add single_notifier_spec.rb
Fix spec for single send
Spec for 404 error
Update enqueue in single_notifier

Mark device_token as is_valid = false if a 404 is recieved
Merge branch 'refs/heads/deregister' into dev
Merge branch 'refs/heads/dev'