node-http2-hpack: Update to HPACK-07
nghttp2: Add seqno
test cases generated by Haskell http2 for ID 07.
update http2-go to Draft-07
nghttp2: Remove redundant default header table size
Add test case to check header table size changes
Upgrading node-http2-protocol results to draft-07
Update twitter-hpack to -07
Update doc
Add hyper's HPACK output.