Note: All updates require the explorer to be restarted

1.6.0 -> 1.6.1
* Add new cryptsy_id and hashrate_units settings (see settings.json.template)
* remove tmp/market.pid (if it exists)

1.5.2 -> 1.6.0
* Change market settings to new format (see settings.json.template)
* Reindex explorerdb (node --stack-size=15000 scripts/sync.js index reindex)

1.5.1 -> 1.5.2
* nothing required, coinbase balance / wealth distribution will be fixed in next sync.
  run sync.js index check to force this if required.

1.5.0 -> 1.5.1
* Optional - Add new labels setting to settings.json (see settings.json.template)

1.4.1 -> 1.5.0
* New database/reindex
* Add new settings to settings.json (see settings.json.template)
  * theme
  * last_txs

1.4.0 -> 1.4.1
* New database created with read/write access. See README.
* Add new settings to settings.json (see settings.json.template)
  * richlist
  * logo

1.3.x -> 1.4.0
* New database
* Add new settings to settings.json (see settings.json.template)
  * show_sent_received

* note: mintpal support has been dropped, replaced with poloniex. Make sure market settings reflect this (see settings.json.template)

1.3.3 -> 1.3.4
* Install new dependency (qr-image)
npm install

1.3.2 -> 1.3.3
* Restart explorer

1.3.1 -> 1.3.2 
* New database
* Add new settings to settings.json (see settings.json.template)
  * heavy
  * supply
  * txcount