Realized that the large cluster support and the advanced hierarchical pages are the same.
This initial commit does some refactoring of the pages.
Left around the define_service_node.rst page but it's not in the index.
We need to verify that the content is correct in define_service_nodes.rst
Check in the initial pages that are generated from the pods
Once these are in, will look into how to autopush changes from the xCAT build scripts
when POD files are changed. This seems to be the quickest way to get the man pages
into the documentaion at this point.
