Add some documentation.

Author: mattbertolini

README.md

@@ -122,6 +122,15 @@ Ivy:
 <dependency org="com.mattbertolini" name="spring-webmvc-annotated-data-binder" rev="0.1.0"/>
 ```
 
+Once the jar is on your classpath, add a `BinderConfiguration` bean to your Spring context:
+
+```java
+@Bean
+public BinderConfiguration binderConfiguration() {
+    return new BinderConfiguration();
+}
+```
+
 ### Spring WebFlux
 
 Maven: