Changelog for circular

Unreleased changes

0.3.1

• Change monadic folds so that commutativity is not anymore required.
• Provide foldKM, a fold over the last k elements on the stack.

0.3.0

• Bugfix take.
• Make functions more consistent (fromVector and toVector now both work on mutable stacks).
• Sort functions.
• Improve documentation.

0.2.0

• Complete rewrite using mutable vectors. A monadic interface is required now, but it is much cleaner in every other sense.

0.1.1

• Remove mean.
• Add benchmark.
• Many small improvements.