sanger/sequencescape — pull request #403 by mattdenner (2012-01-30 16:34:15+00:00)
Title: [fixes #24161163] Add billing to pulldown requests

The pulldown requests need to generate billing events based on state
transitions, as all requests should. Add the concept of billable
request types so that this could be turned on or off for all requests if
that code was included.