Merge pull request #13 from lloydmeta/develop

Merge develop into Master
1. Refactor notifications generator a bit for clarity
2. Add testing for users with multiple APN tokens
More tokens
Add check for fields
Add a test to NotificationGenerator spec to make sure the proper number of notifications are generated
Merge pull request #14 from lloydmeta/refactor/notifications_generator

Refactor/notifications generator
1. Add function on service to clear all notifications for users
2. Add test for 1
3. Add link in Admin panel for accessing said function for a specific service
Merge pull request #15 from lloydmeta/feature/service_clear_notifications

Add 'Clear notifications' function to service for clearing all notifications belonging to users in a specific service.
1. Use batch params on batch_iterate_users_with_notifications method
2. Set send_notifications_to_users to use batch size of 100
Merge pull request #16 from lloydmeta/feature/smaller_batches

Tweak batch sizes
Try more rubies
No more 1.9.2
Merge pull request #17 from lloydmeta/testing/add_more_rubies

Testing/add more rubies