Event bus: Throttling message by message type
Worker: Moving remove zombies from 'ping_api' to 'do_work'

Closes: #60
ApiServerTestCase: Fixing handlers length
WorkerTestCase: Fixing test_description
Releasing 0.8.14
Review model: Cosmetic change

Removing extra empty lines
Config: Moving EVENT_BUS_THROTTLING_MESSAGE_TYPE to default
Added support for retrieving active domains to the domain model.
Adding support for limiters to match a given URL.
Improvements in the next job algorithm
Provide information of reviews in the last hour (fix #65)

In the mean time the information provided consists of the total
number of such reviews. If necessary, other info may -- and should
-- be added.
ReviewsInLastHourHandler: Replacing 'today' with 'utcnow'
Worker: Fixing update_otto_limiter method

AttributeError: 'NoneType' object has no attribute 'update_domain_definitions'
Refactoring ReviewsInLastHourHandler

Counting from first review completed date
Fixing test_can_get_last_reviews_count_in_last_hour
Violations: Fixed some categories
Represent count of requests per status in last day (fix #86)