refine master

@@ -11,8 +11,9 @@ SRS is industrial-strength live streaming cluster, for the best conceptual integ
 The branches of srs:
 
 1. [Release 1.0, Basic rtmp/hls streaming cluster](https://github.com/ossrs/srs/tree/1.0release)
-1. [Release 2.0, Advanced rtmp/flv/hls streaming cluster](https://github.com/ossrs/srs/tree/2.0release)
-1. Master and develop branch are closed.
+1. [Release 2.0](https://github.com/ossrs/srs/tree/2.0release) [![CircleCI](https://circleci.com/gh/ossrs/srs/tree/2.0release.svg?style=svg)](https://circleci.com/gh/ossrs/srs/tree/2.0release), Advanced rtmp/flv/hls streaming cluster.
+1. [Develop](https://github.com/ossrs/srs/tree/develop) [![CircleCI](https://circleci.com/gh/ossrs/srs/tree/develop.svg?style=svg)](https://circleci.com/gh/ossrs/srs/tree/develop), the develop branch.
+1. Master branch are closed.
 
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