Create documentation on Puppet manifests dependency graph

[cliffano]

In order to assist new contributor understanding the manifests flow, it would be handy to generate a dependency graph of how the Puppet manifests are linked together.

Perhaps we can generate the dependency info from Puppet, and then use something like graphviz to generate the graph image.

[Carnifrex]

Perhaps its possible to complete the usage section of the Readme file first, and if possible with examples? I had a lot of difficulties getting a basic setup running due to undocumented formats of variables. This would help new contributers a lot!