This module offers a minimalist class construction kit in around 120 lines
of code. Here is a list of features:
* defines attributes via import arguments
* generates read-write accessors
* supports lazy attribute defaults
* supports custom accessors
* superclass provides a standard new constructor
* new takes a hash reference or list of key/value pairs
* new has heuristics to catch constructor attribute typos
* new calls BUILD for each class from parent to child
* superclass provides a DESTROY method
* DESTROY calls DEMOLISH for each class from child to parent
