* This change abstracts the DatadogStatsClient into a ForemStatsClient.
The purpose of this abstraction is to set the foundation for a subsequent PR that will allow one to use New Relic for recording Forem stats, instead of Datadog, if there is a New Relic configuration found.
This specific change creates an abstraction layer that can be built upon, without changing any actual default behavior. All specs still pass.
* Use delegate instead of explicit methods.
* Delegate instead of explicit methods.
* Fix the error.
* Refactor according to the suggestions in the comments.
* Ooops. Stats work better when all of the code is committed.
* Removing the alias of count to increment since that was done in error.
* Add bust_article service
* Make timestamps lambdas
* Remove nil safe operators
* Updated bust_article specs
* Add spec for TIMEFRAMES and relative time
* Refactor edge caching logic to live in EdgeCache::Service
* Rename EdgeCache::Service to EdgeCache::Buster
* Reorganize some code, move from Buster to Bust naming
