Merge branch 'release/0.16.0' into develop
Fix #95 - Cause:set incorrect status
Modify parts of create_members in sup because of updated redundant-manager
Fix the return tuple correctly when the target of delete_bucket doesn't exist
Merge branch 'develop' into feature/manage_prev_and_cur_member
Add data migration feature which will resolve #100
Updated help to include advanced user commands

In regards of leo-project/leofs#103 added help for the update-user-role and update-user-pw commands.
Merge branch 'develop' into feature/manage_prev_and_cur_member
Merge branch 'feature/manage_prev_and_cur_member' of https://github.com/leo-project/leo_manager into feature/manage_prev_and_cur_member
Switch libs to develop branch
Upgrade s3-libs and redundant-manager
Revise sync-mechanism
Refactor codes in api
Merge branch 'feature/manage_prev_and_cur_member' into develop
Modify hash-related var-names
Support latest redundant-manager#2
Fix that not execute prev-member's sync
Resolve leofs/issues/106
Remove unnecessary codes
Support latest redundant-manager#3