Merge branch 'optimizations'

ma.cabal

src/Data/MorphismEncoding.hs

src/Data/RefinablePartition.hs

src/Data/Vector/Unboxed/Mutable/Utils.hs

src/MA/Algorithm/Initialize.hs

src/MA/Algorithm/Split.hs

src/MA/Algorithm/Types.hs

src/MA/Functors/Distribution.hs

src/MA/Functors/GroupValued.hs

src/MA/Functors/Powerset.hs

tests/MA/Algorithm/InitializeSpec.hs

tests/MA/Algorithm/SplitSpec.hs