Support for SPDY v3, Tests

Added eunit tests for serializing and deserializing all control frame types. Some bug fixes as well, including the SPDY draft 2 [SETTINGS little endian bug](http://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft2#TOC-SETTINGS).

No idea if you have any intention of maintaining this project under your namespace since it hasn't been touched in a while. Let me know!