Update README.md

README.md

@@ -17,7 +17,7 @@ Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
 <dependency>
 	<groupId>com.github.marcus-nl</groupId>
 	<artifactId>ember-schema-generator</artifactId>
-	<version>0.1.0-SNAPSHOT</version>
+	<version>1.0.0</version>
 </dependency>
 ```
 
@@ -31,6 +31,8 @@ Create an instance of EmberSchemaGenerator by passing your Jackson ObjectMapper
 
 The generator will respect the property filters of the object mapper, so that only those properties that are included by the filters will end up in the schema.
 
+Note that addHierarchy will only add those classes that are known by the object mapper, either through ObjectMapper#registerSubtypes or by using the @JsonSubTypes annotation on the base type.
+
 ## Example
 
 Given the following data model: