Add some config to the documentation.

This is for my purposes only - this commit should get rebased away.
Add documentation for every item in the current config
Update documentation a bit.
Update mapping to new format.

This new format makes it much easier to add to the mapping, which was
quite insane before.
Update README.

All the documentation should be able to fit in the README, or I'm not
doing my job correctly.
Refactoring everything to make it a bit simpler.

Moving important stuff to root level package hadmin.py.

Add tests for getting the FQN of various settings.
Update hadmin_test with tests for HXML and QueueManager
Add HXML, QueueManager and tests.
Boom, ready for prime time
Update documentation, remove old garbage.