Change Metrics websocket reporter to return timestamp in milliseconds
Make polling interval configurable for scheduled metrics reporters
Gauge reporting for metrics websocket reporter

Gauge reporting for metrics websocket reporter
Metrics websocket reporting - deal with values that can't be serialized
Metrics websocket reporter support for counters, meters and histograms
Upgrade metrics version
Javadoc.
Introduce MinimalContext, making that available for injection.

This works around the awkwardness of having multiple points of flow control and response access.
Reinstate reloading of action chains.
Javadoc.
Remove unused method.
Remove an init variant, and add some Javadoc.
Make some classes internal, and minor tweaks to the Groovy version check.
Test fixes.
Doc link fixes.
Upgrade to latest Netty version
Use Hikari 1.3.

Closes #259.
Version 0.9.2.
Beginning of version 0.9.3.
Fix fake github data.