HTTP/2 Draft 16

Motivation:
HTTP/2 draft 16 has been released https://tools.ietf.org/html/draft-ietf-httpbis-http2-16.

Modifications:
The HTTP/2 codec should be updated to support draft 16.

Result:
HTTP/2 codec is draft 16 compliant.
Yes, sorry ... I was referring to the ambiguity (or maybe just lack of clarity) of the spec.  The new text implies that IDLE streams have to be implicitly communicated between endpoints in this case.  They should call this out more explicitly IMO.