Create a ServiceRegistry interface.

Allow service discovery systems to register more than one instance.

Automatic registration will still take place.

Add boolean autoRegister() to EnableDiscoveryClient, defaults to true.

Add ServiceRegistryEndpoint.

fixes gh-9

spring-cloud-commons-dependencies/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<artifactId>spring-cloud-dependencies-parent</artifactId>
 		<groupId>org.springframework.cloud</groupId>
-		<version>1.1.2.RELEASE</version>
+		<version>1.2.2.BUILD-SNAPSHOT</version>
         <relativePath/>
 	</parent>
 	<artifactId>spring-cloud-commons-dependencies</artifactId>