Update README.adoc to add reference to HDIV starter

Closes gh-1699

Author: gillarramendi

spring-boot-starters/README.adoc

@@ -22,4 +22,7 @@ list it here. Just send a pull request for this page.
 
 | http://projects.spring.io/spring-batch/[Spring Batch] (Advanced usage)
 | https://github.com/codecentric/spring-boot-starter-batch-web
+
+| http://hdiv.org/[HDIV]
+| https://github.com/hdiv/spring-boot-starter-hdiv
 |===