Entry point for Template Haskell based derivations of Mutagen type classes.

Currently, this supports deriving instances for the Arbitrary, Mutable, Lazy, and Fragmentable type classes.

   {-# LANGUAGE TemplateHaskell #-}
   import qualified Test.Mutagen.TH as TH

   data MyType = Foo | Bar | Baz Int | Qux String
     deriving (Show, Eq, Ord)

   -- Derive all supported instances
   TH.deriveAll ''MyType

   -- Or, alternatively, derive individual instances
   TH.deriveInstance ''MyType ''Arbitrary
   TH.deriveInstance ''MyType ''Fragmentable

   -- While optionally setting custom derivation options
   TH.deriveInstanceWithOptions
     TH.defaultTHOptions
       { TH.optIgnore = ['Qux] -- ignore the Qux constructor
       , TH.optDef = Just 'Bar -- derive def = Bar
       }
     ''MyType
     ''Mutable