Quantity

returning None.
Changed priority of converters: they are tried in *reversed* order
of registration.
Added 'MoneyConverter' ('quantity.money.converter.py').

0.8.1 Refactored class 'Term'.
Some bug fixes.

0.8.0 Exceptions raised by Quantity.__new__ changed to QuantityError.
Added function 'generateUnits'.
Added sub-package 'money'.

0.7.3 Added function 'sum'.
Added method 'Quantity.allocate'.

Unit.
Made 'refUnitSymbol' and 'refUnitName' read-only properties.
Added class property 'quantum' as option to define quantized
quantities.
Removed '__version__' from all sub-modules.

0.7.1 Added 'install_requires' to setup.py.
Corrected unit of 'Kelvin' in doc and README.
Added method 'Quantity.quantize'.
Enhanced method 'Quantity.__round__': round to quantity or unit.

0.7.0 First public release.
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