1.0.0

Initial version with;

• toSci and fromSci for converting Rational to and from Scientific.
• showSci for showing Rational as if Scientific.
• For JSON, instances of ToJSON and FromJSON for newtype Rational that also have instances of DefaultDecimalPlaces and NewType.
• For CSV, instances of ToField and FromField in the same way.
• Template Haskell functions to generate instances.