Change log for galois-field

0.2.1

• Add preliminary implementation of BinaryField.
• Add frob function for GaloisField.
• Add minor improvements to documentation.

0.2.0

• Add deg function for GaloisField.
• Add order function for GaloisField.
• Add pow function for GaloisField.
• Add rnd function for GaloisField.

0.1.1

• Add Arbitrary instances to PrimeField, PolynomialRing, and ExtensionField.
• Add Bits instances to PrimeField.
• Add Pretty instances to PrimeField, PolynomialRing, and ExtensionField.
• Add minor optimisations to multiplication and inversion with INLINE.

0.1.0

• Initial release.