Changes for 0.20    Thu Jun 17 19:33:41  2004
=============================================

* ground up rewrite of both code and tests
    to improve performance

Changes for 0.07    Thu Feb 25 11:14:48 2004
============================================

* quell a 'use of undefined variable' warning
    when checking 'undef' values

Changes for 0.06    Thu Feb 19 15:14:48 2004
============================================

* add template option 'defined'

Changes for 0.05    Tue Feb 10 18:18:23 2004
============================================

* allow nested lists in allow()

Changes for 0.04    Thu Sep 18 13:41:48 2003
============================================

* Use carp to get a better caller perspective
* add the last_error() routine
* add the allow() routine


Changes for 0.03    Wed May 14 14:33:17 2003
============================================

* Verbosity's default setting depends on $^W
* New global flag to not change the casing of keys
