HORNET-0.4.0-rc4

Added

- Show approvers in tx explorer (dashboard)
- Copy transaction hash (dashboard)
- Copy transaction raw trytes (dashboard)
- CTPS graph (dashboard)
- Health check API route (`/healthz`)
- New topics to zmq and mqtt (`lm` & `lsm`)

Changed

- Do not broadcast known tx
- Use new object storage interface
- Update to latest hive.go
- Refactors networking packages and plugins
- Changes default theme to dark (dashboard)

Fixed

- Database flush deadlock
- Local snapshots
- Panics at pruning if bundle was not complete

Config file changes

New options:

config.json

 "httpAPI": {
+    "excludeHealthCheckFromAuth": false,
   },

Renamed config:

neighbors.json --> peering.json