Version   Changes
--------  --------------------------------------------------------------------
0.2.0     Replaced macro 'define-qty' by proc_macro_attribute 'quantity'.
          Added impls of traits 'PartialEq', 'Eq' and 'PartialOrd'.
          Added mod prelude.
          Renamed NON_UNIT to ONE.
          Added fn Unit::iter and fn Quantity::iter_units.
          Enhanced documentation.

0.1.0     First public version.
