add init-container support

Change-Id: If60105ea8b1403e9bf6e660054ada391b17f091e
diff --git a/README.rst b/README.rst
index 4992bdf..b215c92 100644
--- a/README.rst
+++ b/README.rst
@@ -472,6 +472,35 @@
         config:
           enabled: true
 
+initContainers
+--------------
+
+Example pillar:
+
+.. code-block:: bash
+
+    kubernetes:
+      control:
+      service:
+        memcached:
+          init_containers:
+          - name: test-mysql
+            image: busybox
+            command:
+            - sleep
+            - 3600
+            volumes:
+            - name: config
+              mount: /test
+          - name: test-memcached
+            image: busybox
+            command:
+            - sleep
+            - 3600
+            volumes:
+            - name: config
+              mount: /test
+
 Volumes
 -------