A Rackspace section
create and SSH in
rackspace fedora20 doesn't seem to require a kernel upgrade.
Merge remote-tracking branch 'origin/master' into document-rackspace-FLOC-984
use an rfc5737 Ip address
Recommend 8GB RAM for consistency with other clouds.
Add Rackspace to the wordlist
No need to note root password
Merge pull request #977 from ClusterHQ/document-rackspace-FLOC-984

flocker-node deployment instructions for Rackspace

Author: @wallrj
Reviewer: @exarkun

Fixes https://clusterhq.atlassian.net/browse/FLOC-984