Cassave instances for functor-like datatypes like Either String a.

Please see the README on GitHub at https://github.com/mjgajda/cassava-generics#readme

cassava-generics

Cassava ToNamedField instances for standard functors and datatypes. They depend on both ToNamedField and DefaultHeaderOrder instances for a:

• Either String a
• Maybe a

Also for convenience instances for common types:

• [Text] -- tag list
• [(Text,Text)] -- assoc list.