Data.Thyme.Clock: inline {shows,read}Prec for {,Nominal}DiffTime; use divMod
Data.Thyme.Time: RULES for realToFrac between {,Nominal}DiffTime
Data.Thyme.Clock: seconds and {to,from}Seconds'?
Data.Thyme.Clock: RULES for {to,from}Seconds; workaround GHC bug