Add docstrings and improve comments.
Expand and improve README.md file.
Update CHANGELOG.md for v0.1.1.

The initial release had little to no documentation.  This release is a
documentation-only update and should help immensely with getting
started quickly using the module.

* Expand the README.md document.
  * Provide usage examples.
  * Discuss the history and future vision of the module.
* Add docstrings and improve comments.