[DOCS] Adds low-level subsection from ES repo to TOC.

Author: szabosteve

docs/index.asciidoc

@@ -1,20 +1,21 @@
-= Elasticsearch Java High-level client
+= Elasticsearch Java API Client
 
 [partintro]
 --
 
-The {es} Java High-level REST Client is an experimental Java client for {es}. 
-It removes all dependencies to the {es} server code base.
+The {es} Java API Client is an experimental Java client for {es}. It removes all 
+dependencies to the {es} server code base.
 
 * <<introduction>>
 * <<installation>>
 * <<connecting>>
-
+* <<java-rest-low>>
 --
 
 :branch: master
 include::{asciidoc-dir}/../../shared/attributes.asciidoc[]
 
 include::introduction.asciidoc[]
 include::installation.asciidoc[]
-include::connecting.asciidoc[]
+include::connecting.asciidoc[]
+include::{elasticsearch-root}/docs/java-rest/low-level/index.asciidoc[]