Conditionally decode nil-values

[dim]

So here is an alternative approach to #25 with an extended test. Your approach in #26 wouldn't work for that test.

[vmihailenco]

I still prefer you original PR #23. Let me clean it and resend.

Also please don't use msgpack.Register. Marshal/Unmarshal interface is more idiomatic way to support custom encoding.

[dim]

I still prefer you original PR #23. Let me clean it and resend.

Not sure it was such a good idea really. I went over the use cases and there's no real need for all that extra logic, plus it makes the client code really messy. The only 'feature' that is really required is the ability for a client to PeekNil

Also please don't use msgpack.Register. Marshal/Unmarshal interface is more idiomatic way to support custom encoding.

I wish I could, but there's #32

[vmihailenco]

This was addressed in another PR. Closing.