a WebSocket frame corresponds to HEADERS + DATAs, not only HEADERS.
Minor edits
Merge branch 'master' of https://github.com/ricea/ws-over-http2 into ricea-master
:version doesn't have to be WebSocket/13.

RFC6455 update should be possible without updating this description.
Add introduction and add an example of SETTINGS_SUPPORTED_SCHEMES.

Use tyoshino@'s suggestion #14