Merge branch 'release/1.0.0-pre2' into develop
Modify start-command
Modify rebalance-command and refactor
Modify rebalance-command#2 and refactor
Change leo_redundant_manager's branch to develop
Revise syncronization of the rings
Update require_otp_vsn
Refactor codes in the api
Able to use plugin-module on the console
Support plugins
Revise the configurations
Modify default configuration and refactor
Remove unnecessary codes
Move leo_statistics to develop-branch for the test
Fix that not called a function of plugin-mod
Remove an unnecessary row
Implement extention of the help command with a plugin-mod
Update the rule
Add the default config
Modify extention of the help command with a plugin-mod