Format Go SDK readme (#4)

* Update README.md

* Update README.md

* Update README.md

* Update README.md

* Update README.md

* Update README.md

* Update README.md

README.md

@@ -1,24 +1,42 @@
-## milvus-sdk-go
-Go SDK for Milvus distributed high-performance vector search engine
+## Milvus Go SDK
 
- We welcome all kinds of contributions for milvus-sdk-go.
+Go SDK for [Milvus](https://github.com/milvus-io/milvus). To contribute code to this project, please read our [contribution guidelines](https://github.com/milvus-io/milvus/blob/master/CONTRIBUTING.md) first.
+
+|Milvus version| Recommended Go SDK version |
+|:-----:|:-----:|
+| 0.7.0 | 0.1.0|
 
 ### Getting started
-You will need go 1.12
 
-#### Install
-Use go get to install the latest version of the library. This command will install the milvus-go-sdk library and its dependencies:
-```shell
-go get -u github.com/milvus-io/milvus-sdk-go/milvus
-```
-Next, include milvus-sdk-go in your application:
-```shell
-import "github.com/milvus-io/milvus-sdk-go/milvus"
-```
-### Try go example
+#### Prerequisites
+
+Go 1.12 or higher
+
+#### Install Milvus Go SDK
+
+1. Use `go get` to install the latest version of the Milvus Go SDK and dependencies:
+
+   ```shell
+   go get -u github.com/milvus-io/milvus-sdk-go/milvus
+   ```
+
+2. Include the Milvus Go SDK in your application:
+
+   ```shell
+   import "github.com/milvus-io/milvus-sdk-go/milvus"
+   ```
+
+#### Try an example
+
 ```shell
 cd [milvus-sdk-go root path]/examples
 go run MilvusClientExample.go
 ```
-### Additional information
-- The go source code is formatted using go fmt and golint
+
+### API Documentation
+
+Refer to [https://godoc.org/github.com/milvus-io/milvus-sdk-go/milvus](https://godoc.org/github.com/milvus-io/milvus-sdk-go/milvus) for the GO SDK API documentation.
+
+### Code format
+
+The Go source code is formatted using gofmt and golint.