Live Feed API

[stackdump]

New API for live feed isn't documented

The only realy change to the existing v2 api is to trigger the replay of a directory block
https://github.com/FactomProject/factomd/blob/876dcff939365e547955211c88e53ead2a50d041/wsapi/wsapiV2.go#L94-L95

There is some documentation inside the codebase : https://github.com/FactomProject/factomd/blob/master/events/README.md

This feature does exist in the factom python API.

Tracking for js lib PaulBernier/factomjs#20