initial commit of a basic rolling upgrade guide, based on the lamp_haproxy example
flesh out the CI/CD and load balancer sections a bit
tweak some links and phrasing
Add guide_rax.rst
Merge branch 'rax-guide' of git://github.com/sivel/ansible into devel
Wrap lines a bit tighter for easier editing.
Some minor tweaks to make things a little more tutorial-like, moved credentials section up higher, etc.
Merge branch 'lamp_tutorial' of git://github.com/tgerla/ansible into devel
Some slight tweaks to the continuous delivery docs.