Traptor

This release includes the following enhancements:

- (Feature) Log limit messages to Elasticsearch
- (Feature) Add a logging message indicating a tweet has been processed
- (Feature) Additional Traptor metrics for DataDog Monitoring
- (Feature) Piscina integration
- (Bugfix) Threads need semaphores
- (Bugfix) Tenacity usage currently suppresses exception messages
- (Bugfix) Traptor heartbeat flaw
- (Bugfix) Log statement strings should not have interpolation / concatenation

This release includes a hotfix for mishandling of exceptions in `main()`, causing traptors to exit on errors without raising an exit value. (76)

This release of Traptor includes a hotfix for an error caused when tweet processing restarts and the stats counters are created (66).

This release includes 65 which deletes the previous rule counters from Redis when Traptor restarts so that Traptor is only logging hits to its current set of rules.

This version of Traptor brings retrying functionality to all Redis, Kafka and Twitter calls.