Revision history for Tie-Hash-Attribute

0.05
        - attribute keys are case-insesitive
        - encoding for keys and values via HTML::Entities

0.04
        - prepending space to attribute string
        - sorting the deepest level hash keys for consistency 
        - omitting semi-colon in attribute string when possible

0.03
        - added SCALAR back to interface (like 0.01 + 0.02)

0.02
        - Changed interface: can now access first level of keys by
            pre-pending a dash to the key to be emitted as attributes

0.01
        - First version, released on an unsuspecting world.