Add opt. resume guests on host boot (#10)

diff --git a/README.rst b/README.rst
index 7201452..8105aaa 100644
--- a/README.rst
+++ b/README.rst
@@ -132,6 +132,7 @@
         virtualization: kvm
         availability_zone: availability_zone_01
         security_group: true
+        resume_guests_state_on_host_boot: False
         bind:
           vnc_address: 172.20.0.100
           vnc_port: 6080