Merge pull request #264 from mreiferson/move_go_nsq_264

go-nsq: move to github.com/bitly/go-nsq
nsqd: add deflate compression negotiation:

* add --deflate and --max-deflate-level flag
* add feature negotiation for nsqd clients
nsqd: add framed snappy compression
nsqd: add/use DefaultBufferSize
nsqd: re-org, move flush into client

* drop defer in fast path
update test/dist dependencies