Data.Thyme.Calendar.WeekdayOfMonth: re-export Year, Month, DayOfWeek

∙ In particular, DayOfWeek is otherwise only found when the user explicitly
  import Data.Thyme.Calendar.WeekDate
Data.Thyme: deriving Unbox for ALL THE newtype THINGS
tests/bench.hs: use boxed Vector instead of []

∙ Unboxed vectors made things a little too unfair for time.
tests/bench.hs: compare toSeconds vs realToFrac ∷ … → Double
Data.Thyme.Clock.Internal: INLINE fromSeconds{RealFrac,Integral}
Reduce arity of various vector-space operators for better inlining

∙ Partially applied operators weren't been inlined.
∙ Can't do anything about things that aren't class methods right now,
  e.g. (.-^). Need to fix vector-space.
thyme.cabal: version: 0.3.4.0