nsqd: cpu profile should be .../profie to support direct profiling
nsqd: limit the amount we will read for HTTP publishing
reader: lookupd poll changes

* configurable jitter
* 60s default poll interval
* query one lookupd at a time
* handle properly reconnects w/ a pending connection
Merge pull request #252 from mreiferson/cpu_profile_endpoint_252

nsqd: use correct CPU profile endpoint
Merge pull request #251 from mreiferson/http_publish_limits_251

nsqd: better enforcement of body/msg limits in HTTP publish
Merge pull request #250 from jehiah/lookupd_poll_interval_250

reader: distribute lookupd requests
nsqd: add deflate compression negotiation:

* add --deflate and --max-deflate-level flag
* add feature negotiation for nsqd clients
* add deflate to Reader (and tests)