Update readme for Support Spring Boot (#528)

* Add support for spring boot 2.1.x.
* Update doc of branch and release.

Signed-off-by: Pan Li <panli@microsoft.com>

Author: Incarnation-p-lee

README.md

@@ -11,7 +11,7 @@
 This repo is for Spring Boot Starters of Azure services. It helps Spring Boot developers to adopt Azure services.
 
 ### Support Spring Boot
-This repository supports both Spring Boot 1.5.x and 2.0.x. Please read [this document](https://github.com/Microsoft/azure-spring-boot/wiki/Spring-Boot-dependency-version-management) for branch mapping.
+This repository supports both Spring Boot 1.5.x, 2.0.x and 2.1.x. Please read [Branch and release](https://github.com/Microsoft/azure-spring-boot/wiki/Branch-and-release) for branch mapping.
 
 ### Prerequisites
 - JDK 1.8 and above
@@ -22,17 +22,16 @@ This repository supports both Spring Boot 1.5.x and 2.0.x. Please read [this doc
 Below starters are available. You can find them in [Maven Central Repository](https://search.maven.org/).
 The first three starters are also available in [Spring Initializr](http://start.spring.io/). 
 
-Starter Name | Version
----|---
-[azure-active-directory-spring-boot-starter](azure-spring-boot-starters/azure-active-directory-spring-boot-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-active-directory-spring-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-active-directory-spring-boot-starter%22)
-[azure-storage-spring-boot-starter](azure-spring-boot-starters/azure-storage-spring-boot-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-storage-spring-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-storage-spring-boot-starter%22)
-[azure-keyvault-secrets-spring-boot-starter](azure-spring-boot-starters/azure-keyvault-secrets-spring-boot-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-keyvault-secrets-spring-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-keyvault-secrets-spring-boot-starter%22)
-[azure-cosmosdb-spring-boot-starter](azure-spring-boot-starters/azure-cosmosdb-spring-boot-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-cosmosdb-spring-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-cosmosdb-spring-boot-starter%22)
-[azure-mediaservices-spring-boot-starter](azure-spring-boot-starters/azure-mediaservices-spring-boot-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-mediaservices-spring-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-mediaservices-spring-boot-starter%22)
-[azure-servicebus-spring-boot-starter](azure-spring-boot-starters/azure-servicebus-spring-boot-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-servicebus-spring-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-servicebus-spring-boot-starter%22)
-[spring-data-gremlin-boot-starter](azure-spring-boot-starters/spring-data-gremlin-boot-starter) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/spring-data-gremlin-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22spring-data-gremlin-boot-starter%22)
-[azure-spring-boot-metrics-starter](azure-spring-boot-starters/azure-spring-boot-metrics-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-spring-boot-metrics-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-spring-boot-metrics-starter%22)
-
+Starter Name | Version for Spring Boot 2.1.x | Version for Spring Boot 2.0.x
+---|:---:|:---:
+[azure-active-directory-spring-boot-starter](azure-spring-boot-starters/azure-active-directory-spring-boot-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-active-directory-spring-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-active-directory-spring-boot-starter%22) | [![](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-active-directory-spring-boot-starter/2.0.svg)](https://search.maven.org/artifact/com.microsoft.azure/azure-active-directory-spring-boot-starter/2.0.8/jar)
+[azure-storage-spring-boot-starter](azure-spring-boot-starters/azure-storage-spring-boot-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-storage-spring-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-storage-spring-boot-starter%22) | [![](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-storage-spring-boot-starter/2.0.svg)](https://search.maven.org/artifact/com.microsoft.azure/azure-storage-spring-boot-starter/2.0.8/jar)
+[azure-keyvault-secrets-spring-boot-starter](azure-spring-boot-starters/azure-keyvault-secrets-spring-boot-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-keyvault-secrets-spring-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-keyvault-secrets-spring-boot-starter%22) | [![](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-keyvault-secrets-spring-boot-starter/2.0.svg)](https://search.maven.org/artifact/com.microsoft.azure/azure-keyvault-secrets-spring-boot-starter/2.0.8/jar)
+[azure-cosmosdb-spring-boot-starter](azure-spring-boot-starters/azure-cosmosdb-spring-boot-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-cosmosdb-spring-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-cosmosdb-spring-boot-starter%22) | [![](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-cosmosdb-spring-boot-starter/2.0.svg)](https://search.maven.org/artifact/com.microsoft.azure/azure-cosmosdb-spring-boot-starter/2.0.8/jar)
+[azure-mediaservices-spring-boot-starter](azure-spring-boot-starters/azure-mediaservices-spring-boot-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-mediaservices-spring-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-mediaservices-spring-boot-starter%22) | [![](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-mediaservices-spring-boot-starter/2.0.svg)](https://search.maven.org/artifact/com.microsoft.azure/azure-mediaservices-spring-boot-starter/2.0.8/jar)
+[azure-servicebus-spring-boot-starter](azure-spring-boot-starters/azure-servicebus-spring-boot-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-servicebus-spring-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-servicebus-spring-boot-starter%22) | [![](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-servicebus-spring-boot-starter/2.0.svg)](https://search.maven.org/artifact/com.microsoft.azure/azure-servicebus-spring-boot-starter/2.0.8/jar)
+[spring-data-gremlin-boot-starter](azure-spring-boot-starters/spring-data-gremlin-boot-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/spring-data-gremlin-boot-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22spring-data-gremlin-boot-starter%22) | [![](https://img.shields.io/maven-central/v/com.microsoft.azure/spring-data-gremlin-boot-starter/2.0.svg)](https://search.maven.org/artifact/com.microsoft.azure/spring-data-gremlin-boot-starter/2.0.8/jar)
+[azure-spring-boot-metrics-starter](azure-spring-boot-starters/azure-spring-boot-metrics-starter/README.md) | [![Maven Central](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-spring-boot-metrics-starter.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20a%3A%22azure-spring-boot-metrics-starter%22) | [![](https://img.shields.io/maven-central/v/com.microsoft.azure/azure-spring-boot-metrics-starter/2.0.svg)](https://search.maven.org/artifact/com.microsoft.azure/azure-spring-boot-metrics-starter/2.0.8/jar)
 
 
 ### How to Build and Contribute