Add required_context hints on type search

Cloogle.dcl

@@ -87,6 +87,7 @@ from GenEq import generic gEq
 	= { func                :: String         //* A string representation of the type
 	  , kind                :: FunctionKind   //* The kind of function
 	  , unifier             :: Maybe StrUnifier //* A unifier, if the request included a type
+	  , required_context    :: Maybe [(String, [LocationResult])] //* Instances or derivations that are needed (if the request included a type)
 	  , cls                 :: Maybe ShortClassResult //* The class, if this is a class member
 	  , constructor_of      :: Maybe String   //* The type that this is a constructor of
 	  , recordfield_of      :: Maybe String   //* The type that this is a record field of