v0.9

• Add constructors for Either (left() and right()).
• Improve tests and coverage
• Default Eq1::liftEq() to call the supplied $eq function, assuming user has passed equals() there. (possibly buggy)
• Add a silly implementation of Sum as a use case for Monoid and Semigroup
• Improved and/or new type classes and their instance interfaces: Ord, Semigroup, Monoid, Foldable.

Full Changelog: v0.8...v0.9