* Added sync log to streamer.
* Fixed ledger closing attempt while syncing.
* Added diagnostic contract.
* Reset to stage 0 on unreliable votes.
* Reduced peer msg age threshold.
* Added health tracking.
* Weakly-connected detection improvement.
* Increased version 0.5.1.
* Improved client lib server version check.
* Added health logging support to text client.
* Added weakly connected status in status response.
* Increased max peers limits when serializing.
* Local docker cluster manual ip.
* Updated vultr script vm region order.
* Sync status reporting improvement.
* Added milliseconds to logging.
* Added node's current status information tracker.
* Used the status tracker for responding to status messages.
* Used change-event notifications to broadcast UNL change event.
- Introduced input hash which can later be used to query the ledger.
- Returned input hash and ledger info at input submission.
- Updated js client lib to support input hash.
- Updated consensus proposal candidate expiration rules.
Introduced json and bson messages for unl list announcement.
When the unl set is modified send a json or bson unl list message (according to the user protocol) to all the connected users.
