2009-08-07 0.66 - H.Merijn Brand

• Reordered examples in doc to show best method first
• Documentation grammatical fix (John P. Linderman, RT#46411)
• Fail if first arg to new () is not a hash ref
• Implement empty_is_undef on request of Evan Carroll
• Typo in documentation (Herwin Weststrate, RT#47613)
• error_diag () uses warn () in void context instead of STDERR
• Added auto_diag attribute (still under construction)
• FIX: reset attributes (after they have been set) with accessor