Changelog for group-with-0.2.0.1

** 0.2.x 0.2.0.0 --> 0.2.0.1 =============== * Fix dependency issue: Can't build with containers < 0.5.0.0 0.1.0.0 --> 0.2.0.0 =============== * Support monadic and applicative (where possible) grouping * Add and fix unit tests for monadic and pure grouping * Use strict map by default to avoid buildup of thunks