Merge pull request #352 from pleary/statsd

Refactored stats collection to use ActiveSupport::Notifications, be less invasive
Changing the delayed job attemts from 25 to 10, retaining failed jobs
Updated syntax in delayed jobs config
Merge pull request #354 from pleary/master

Changing the delayed job attemts from 25 to 10, retaining failed jobs
Minor bugfix for obs field value validation.
Removed measurements of db and view time