Update virtlet deployment procedure.

Added dockershim service.
Removed kubelet.conf as not required.
Bump version to v0.8.0.

Change-Id: I6527213b3db3c8e9f2a5f1e8349624f9353fccaa
diff --git a/README.rst b/README.rst
index c3df5f7..60ef3b4 100644
--- a/README.rst
+++ b/README.rst
@@ -71,7 +71,7 @@
             virtlet:
               enabled: true
               namespace: kube-system
-              image: mirantis/virtlet:v0.7.0
+              image: mirantis/virtlet:v0.8.0
               hosts:
               - cmp01
               - cmp02