* Fix bug stop stopSpan when not createSpan

* Fix bug stop stopSpan when not createSpan

* change the agent log level to millisecond

* add the function of the specified-agent-config

* Update README_ZH.md

* Use -D  to set the specified config path

* add docs

* update docs

* change method name

* add link

* change the function name

* change the key

* format doc