checkpoint
engine.io-parser: encode/decode packet
go fmt
engine.io-parser: encode/decode base64
encode/decode payload with tests.

TODO: supports on encode/decode payload as binary.
DecodePayloadAsBinary
encode/decode payload as binary. finished parser.
checkpoint 2

"just" passed compilation
With more modifications.
Pass the first two tests.
Passed one more test. Refined engineio.Attach
Add a test as starting point for polling.
checkpoint, Apr 24. passed go build.
handshake ok.
cleanup debug info.
Copied testing files from github.com/LearnBoost/engine.io/test
before eioc merge test
pass "on connection" with engine.io-client.
Make socket.request public
make req.query public