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

It uses no non-core modules for any recent Perl. On Perls older than
v5.10 it requires MRO::Compat. On Perls older than v5.14, it requires
Devel::GlobalDestruction.