This envolves adding the requirement, that every Encoding must also be an instance of Eq and Typeable to go into DynEncoding.
darcs-hash:20090225035150-a4fee-c7d902e28313929ee9ffe0c6a6b60d8ff4704ae9
Now it's possible to change the character encoding while de-/encoding.
Also, it's possible to use any data structure as a source or target of the de-/encoding process.
darcs-hash:20090221203100-a4fee-6da31f2e37c30a3f5cd5f10af71984209488bb0b
