Core
 - Added scheduling, daemon running

Agent Framework
 - Taken from https://github.com/crossref/event-data-agent-framework version 0.2.2
 - Renamed 'agent-definition' to 'manifest'.
 - Moved common functions into util namespace, including letting an Agent fetch its own Artifacts.
 - Moved responsibility for registering schedule back to Agent, with Quartize scheduler.
 - Removed :required-artifacts, now Agents fetch them themselves.
 - Moved JWT generation and attachment to Evidence Record into send-evidence-record

All Agents
 - Removed version from manifest, as the whole codebase is now versioned at the top level.
 - Removed separate JWT configuration value from each Agent, now built from secret.
 - Added evidence logging everywhere

Hypothesis
 - taken from https://github.com/crossref/event-data-hypothesis-agent version 0.2.2
 - added Evidence Logging, entire scan is now sent as a single Evidence Record (for Record ID trace)

Wordpress
 - fixed page de-duplication (was taking 1 too few)