release-v1.6.4-20190530

BUGFIX: fix bug of 'GetDetailedInfo' panic

release-v1.6.3-20190526

IMPROVE: 1. target address supports cluster 2.supports TLS for standa…

release-v1.6.2-20190516

bugfix: fix bug of 'rump' mode only syncing db 0 data

release-v1.6.1-20190514

improve: support fetching address from sentinel

release-v1.6.0-20190508

add release tar