Add skeletons for remainder of documentation.

As a means to better assist me with finishing up the documentation,
I have added skeletons to enable me to fill in the details when my
brain is sufficiently rested to write useful and meaningful prose
about a mundane and detail-oriented topic for external persons.
Merge pull request #24 from prometheus/feature/documentation/complete-jvmstat-documentation

Add skeletons for remainder of documentation.