--------------
0.07 Sun Mar 1 12:32:44 PST 2015
Misc
* Update metadata to point at Github.
* Discourage use of this module, there are better solutions.
* Clarify the license link in the documentation.
This module is a base class for implementing virtual base classes (what
some people call an abstract class). Kinda kooky. It allows you to
explicitly declare what methods are virtual and that must be implemented
by subclasses.