Compressor: better logging for emitted representations
Framer, Compressor: implementing the CONTINUATION frame.
Endpoint: let the first client stream ID be 3 instead of 1.
Framer: updating SETTINGS frame parsing to match draft-06
Endpoint: reverting to 1 as first client stream ID.
Framer, Flow, Connection: moving to global flow control disabling
Framer, Endpoint: enforcing the 16kb max frame size limit.
HTTP: check for invalid headers in all incoming and outgoing message. Fixes #44