Version     Changes
------------------------------------------------------------------------------
0.9.10      Added method `quantize`.

0.9.9       Changed `magnitude`: return largest integer exp so that
            10 ** exp <= self

0.9.8       Fixed bug in __format__

0.9.7       Restructured Python code, so that it follows the structure of the
            Cython code. Results in a small performance gain.
            Minimum precision of the quotient of two Decimals is now set to
            max(0, numerator.precision - denominator.precision).

0.9.6       Fixed bug in __trunc__ and __str__

0.9.5       First public release
