Merge pull request ethereum#3 from chunfuyang/feat/update-readme

README.md:update API refence and gitter URL

README.md

@@ -5,11 +5,11 @@
 [![OpenRPC](https://img.shields.io/static/v1.svg?label=OpenRPC&message=1.0.10&color=blue)](#openrpc-discovery)
 [![API Reference](
 https://camo.githubusercontent.com/915b7be44ada53c290eb157634330494ebe3e30a/68747470733a2f2f676f646f632e6f72672f6769746875622e636f6d2f676f6c616e672f6764646f3f7374617475732e737667
-)](https://godoc.org/github.com/multi-geth/multi-geth)
+)](https://godoc.org/github.com/etclabscore/core-geth)
 [![Go Report Card](https://goreportcard.com/badge/github.com/etclabscore/core-geth)](https://goreportcard.com/report/github.com/etclabscore/core-geth)
 [![Travis](https://travis-ci.org/etclabscore/core-geth.svg?branch=master)](https://travis-ci.org/etclabscore/core-geth)
-[![Gitter](https://badges.gitter.im/multi-geth/community.svg)](https://gitter.im/multi-geth/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
-[![Code Shelter](https://www.codeshelter.co/static/badges/badge-flat.svg)](https://www.codeshelter.co/)
+[![Gitter](https://badges.gitter.im/core-geth/community.svg)](https://gitter.im/core-geth/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+
 
 Binary archives are published at https://github.com/etclabscore/core-geth/releases.