When creating an object, YARD will split the object name using `::` and
recursively create proxy namespaces for each component. Unfortunately this
process is optimized for Ruby and somewhat mangles Puppet code as Puppet class
names are not capitalized.
For now, dispense with this behavior by implementing `HostClassObject.new`.
Instead of documenting Puppet classes using `ClassObject`, use a custom
subclass of `NamespaceObject`. This is done because Puppet classes are not Ruby
classes and will have components that don't fit into the model offered by
`ClassObject`.
This commit also adds a couple of monkey patches to integrate the new
`:hostclass` into YARD tooling and the beginnings of some custom templating.