change in name of prepare script.

Author: paulczar

contrib/rackspace/README.md

@@ -34,10 +34,10 @@ Provision a Deis Controller on Rackspace
     1. SSH in as root with the password shown
     1. Install the 3.8 kernel with: ```apt-get update && apt-get install -yq linux-image-generic-lts-raring linux-headers-generic-lts-raring && reboot```
     1. After reboot is complete, SSH back in as root and `uname -r` to confirm kernel is `3.8.0-35-generic`
-    1. Run the `prepare-rackspace-image.sh` script to optimize the image for fast boot times
+    1. Run the `prepare-controller-image.sh` script to optimize the image for fast boot times
 
         ```console
-        $ \curl -sSL https://raw2.github.com/opdemand/deis/master/contrib/rackspace/prepare-rackspace-image.sh | bash
+        $ \curl -sSL https://raw2.github.com/opdemand/deis/master/contrib/rackspace/prepare-controller-image.sh | bash
         Reading package lists... Done
         Building dependency tree
         Reading state information... Done