Added shell for stats service to prep for batching remote calls
Renaming LocalService to LocalCoreDataService for appropriateness
Calling all endpoints on batch, need to map and return data still
Implemented AFNetworking 2.2.3 support.
Merge branch 'develop' into issue/1618-AFNetworking2
Fixes for the AFNetworking 2.2.3 migration.
Finished mapping all batch data to collections for passback
Added a failure completion handler to the stats service
Ripped out individual refresh calls and replaced with a single reload
Some additional fixes for AFNetworking 2.2.3.
Add missing failure completion handler call
Add WPAccount as a parameter to stats service

This dependency will have to get removed/resolved properly when the service is exported to an external library.
Remove StatsApiHelper (pre-batch)
Merge branch 'develop' into feature/1686-batch-stats
Updated WordPressApi pod location for AFNetworking 2.2.3.
Added first unit test for WPStatsService
Merged develop -> issue/1618-AFNetworking2.
Refactored stats services after testing exposed some design issues

Also added beginnings of remote service test
Minor code style corrections.
Re-added missing test