Version   Changes
--------  --------------------------------------------------------------------
0.4.0     Added impls of trait DivRounded for native integers.
          Added traits AsIntegerRatio and Quantize as well as corresponding
          implementations for Decimal and native ints.

0.3.1     Check resulting n_frac_digits > MAX_N_FRAC_DIGITS in fn mul.

0.3.0     Added "checked" variants of Add, Div, Mul, Rem and Sub as well as
          corresponding implementations.

0.2.0     Added conversion from `f32` and `f64` to `Decimal`.

0.1.0     First public version.
