Version 0.0.2: Tided up cabal file and removed spurious dependency on Parsec.
Version 0.0.3: Updated for Haskell Platform 2014.2.0.0 and GHC 7.8.3. Fixed some minor documentation issues.
Version 0.0.4: Updated for Dimensional 1.0.
Version 0.0.5: Fixed bug in Monoid instance for Helmert. Created Semigroup instance for Helmert.
Version 0.0.6: Prevent attempted building on GHC 7.8 (it doesn't work) and fix the build on 7.10 with a conditional semigroups dependency
Version 0.1.0: Updated for Dimensional 1.3 and GHC 8.6.