implement reply topic
implement reply_comment
added test doc
added service dependencies in deploy.md
revised wrong schemas
implement modify comment / reply
reformat code
thread safe update (ensure update the correct document)
implement delete comment / reply
added RabbitMQ dependency
Merge branch 'feature-git' into develop
Merge branch 'feature-discussion' into develop
Merge branch 'basic-testcase' into develop
move tools
fix init.php error in cli
fix path reference
cli check_issues
cli generate_RSA
added README
Update README.md