Change the status of master.  Remove link to QQ, only leave gitter for further communication.

#62 provide skywalking-application-toolkit and skywalking-toolkit-activation submodule, and log4j 1.x plugin to output TraceId

change doc about userId to username

* 'master' of https://github.com/wu-sheng/sky-walking:
  Update README.md

Webui use register center to find routing server. and use searchClient to search traceId. Waiting for integration test.

Thank @raphw for the review.