additional status code / atom conversions
whitespace fixes
Block frames with different versions

It's not valid for a frame in a SPDY session to have a different version
than the rest of the session, so we should send the appropriate errors
(either stream or session) when this condition occurs.
readme updates to reflect v3 support
Merge pull request #3 from bgentry/one-version-per-session

One SPDY version per session
Merge pull request #4 from bgentry/readme-v3

readme updates to reflect v3 support