Upgrade Instructions

https://github.com/johnsusek/praeco#upgrading

Release Notes

ElastAlert Server

https://github.com/johnsusek/praeco/wiki/praeco-&-elastalert-server-docker-image-relations-table
https://github.com/johnsusek/elastalert-server/blob/master/DockerImageLog.md

Praeco

• fix multiple query keys bug

  No graph and no OVER all documents #335