Title   : get_sections
 Usage   : my @values = $configurator->get_sections();
 Function: Returns a list of the valid sections except
           the default or undef.
 Returns : A list of the sections which can be queried.
 Args    : (optional section as string, tag as string)

 Title   : get_tags
 Usage   : my @values = $configurator->get_tags();
           or
           my @values = $configurator->get_tags('dna');
 Function: Returns a list of tags for a given section
           or only the default tags section if no section
           is given.
 Returns : A scalar list of tags
 Args    :

 Title   : get
 Usage   : my $value = $configurator->get('height');
           or
           my $value = $configurator->get('dna','height');
 Function: Returns a tag value from a configurator from the
           either the default "_general" section or from
           a specified section or undef.
 Returns : A scalar value for the tag
 Args    : (optional section as string, tag as string)

 Title   : set
 Usage   : $configurator->set('fgcolor','chartreuse');
           or
           $configurator->set('EST','fgcolor','chartreuse');
 Function: Set a value for a tag
 Returns : The old value of the tag
 Args    : (optional section as string, tag as string, value as scalar)

 Title   : get_and_eval
 Usage   : my $value = $configurator->get_and_eval('height');
           or
           my $value = $configurator->get_and_eval('dna','height');
 Function: This works like get() except that it is
           also able to evaluate code references.  These are
           options whose values begin with the characters
           "sub {".  In this case the value will be passed to
           an eval() and the resulting codereference returned.
 Returns : A value of the tag or undef.
 Args    : (optional section as string, tag as string)