2.4.0

This release adds several features:

• Inclusion of Push Jobs Server in a mostly-HA fashion!
• Ability to select Elasticsearch version - 5.3 is recommended for all new installs, but if you have a pre-existing install you don't want to switch this or you'll lose all ES data and need to reindex

2.3.0

v2.3.0

Improve the upgrade instructions a bit